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R/plot.R
In TBSignatureProfiler: Profile RA-Seq Data Using TB Pathway Signatures
Defines functions
distinctColors
signatureGeneHeatmap
signatureBoxplot
signatureHeatmap
Documented in
distinctColors
signatureBoxplot
signatureGeneHeatmap
signatureHeatmap
globalVariables(c("BS_AUC", "FPR", "LowerTPR", "Signatures",
"TBsignatures", "TPR", "UpperTPR", "sigAnnotData"))
#' Plot a heatmap of signature scores.
#'
#' This function takes a dataset of scored gene expression data as an input
#' and returns a ComplexHeatmap plot for for visual comparison of
#' signature performance.
#'
#' If both \code{annotationData = NULL} and \code{annotationColNames = NULL},
#' no annotation bar will be drawn on the heatmap.
#'
#' @param inputData an input data object. It should either be of the class
#' \code{SummarizedExperiment} and contain the profiled signature data and
#' annotation data as columns in the colData, or alternatively be of the classes
#' \code{data.frame} or \code{matrix} and contain only the gene expression data.
#' Required.
#' @param annotationData a \code{data.frame} or \code{matrix} of annotation
#' data, with one column. Only required if \code{inputData} is a
#' \code{data.frame} or \code{matrix} of signature data.
#' The row names must equal those of the \code{inputData} column names.
#' Default is \code{NULL}.
#' @param name a character string with the plot title of the heatmap. The
#' default is \code{"Signatures"}.
#' @param signatureColNames a vector of the column names in \code{colData} that
#' contain the signature data. Only required if \code{inputData} is a
#' SummarizedExperiment object.
#' @param annotationColNames a vector of the column names in \code{colData} that
#' contain the annotation data. Only required if \code{inputData} is a
#' \code{SummarizedExperiment}. Default is \code{NULL}.
#' @param colList a named \code{list} of named vectors specifying custom color
#' information to
#' pass to \code{ComplexHeatmap::Heatmap()}. The list should have as many
#' elements as there are annotation columns, and each element name should
#' correspond exactly with the name of each annotation column.
#' The colors in the vector elements should be named according to the
#' levels of the factor in that column's annotation data if the annotation
#' is discrete, or it should be produced with \code{circlize::colorRamp2}
#' if the annotation is continuous.
#' By default, \code{ColorBrewer} color sets will be used.
#' See the the parameter \code{colorSets} for additional details.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{FALSE}.
#' @param showColumnNames logical. Setting \code{showColumnNames = TRUE} will
#' show the column names (i.e. sample names) on the heatmap. The default is
#' \code{TRUE}.
#' @param showRowNames logical. Setting \code{showColumnNames = TRUE} will
#' show the row names (i.e. signature names) on the heatmap. The default is
#' \code{TRUE}.
#' @param colorSets a vector of names listing the color sets in the order
#' that they should be used in creating the heatmap. By default, this function
#' will use the color sets in the order listed in \code{Usage} for annotation
#' information. You may replace the default with the same collection of sets
#' in order that you want to use them, or provide custom color sets with the
#' \code{colList} parameter.
#' @param choose_color a vector of color names to be interpolated for the
#' heatmap gradient, or a \code{colorRamp} function produced by
#' \code{circlize::colorRamp2}. The default is \code{c("blue", "gray95", "red")}.
#' @param split_heatmap a character string either giving the column title of
#' \code{annotationSignature} containing annotation data for which to split
#' the heatmap rows (i.e., signatures), or \code{"none"} if no split is desired.
#' The default is \code{"disease"}.
#' @param annotationSignature a \code{data.frame} or \code{matrix} with information
#' to be used
#' in splitting the heatmap. The first column should signature names. The
#' column of annotation information should be specified in \code{split_heatmap.}
#' Other columns will be ignored. The default is \code{sigAnnotData}.
#' @param ... Additional arguments to be passed to
#' \code{ComplexHeatmap::Heatmap()}.
#'
#' @return A ComplexHeatmap plot.
#'
#' @import BiocParallel bioDist readr boot ggfortify e1071
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#' signatureHeatmap(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = "sample", scale = TRUE,
#' showColumnNames = FALSE, split_heatmap = "none")
#'
#' # Example using custom colors for the annotation information
#' color2 <- stats::setNames(c("purple", "black"), c("down", "up"))
#' color.list <- list("sample" = color2)
#'
#' signatureHeatmap(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = "sample", scale = TRUE,
#' showColumnNames = FALSE,
#' colList = color.list, split_heatmap = "none")
#'
signatureHeatmap <- function(inputData, annotationData = NULL, name = "Signatures",
signatureColNames,
annotationColNames = NULL,
colList = list(), scale = FALSE,
showColumnNames = TRUE,
showRowNames = TRUE, colorSets = c("Set1", "Set2",
"Set3", "Pastel1", "Pastel2", "Accent", "Dark2",
"Paired"),
choose_color = c("blue", "gray95", "red"),
split_heatmap = "disease",
annotationSignature = sigAnnotData,
...) {
if (methods::is(inputData, "SummarizedExperiment")){
if (any(duplicated(signatureColNames))){
stop("Duplicate signature column name is not supported.")
}
if (!all(signatureColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Signature column name not found in inputData.")
}
if (!is.null(annotationColNames)) {
if (!all(annotationColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Annotation column name not found in inputData.")
}
annotationData <- SummarizedExperiment::colData(inputData)[, annotationColNames, drop = FALSE]
inputData <- SummarizedExperiment::colData(inputData)[, signatureColNames, drop = FALSE]
}
} else {
if (is.null(annotationData)) {
stop("annotationData must be provided for a data.frame input object.")
} else if (!is.null(annotationData)) {
annotationColNames <- colnames(annotationData)
}
}
if (!is.null(annotationData)) {
if (nrow(annotationData) == nrow(inputData)){
if (!all(rownames(annotationData) == rownames(inputData))){
stop("Annotation data and signature data does not match.")
}
} else if (nrow(annotationData) == ncol(inputData)){
if (!all(rownames(annotationData) == colnames(inputData))){
stop("Annotation data and signature data does not match.")
}
inputData <- t(inputData)
} else {
stop("Annotation data and signature data does not match.")
}
}
sigresults <- t(as.matrix(inputData))
keyname <- "Score"
if (scale){
sigresults <- t(scale(t(sigresults)))
keyname <- "Scaled Score"
}
# To split heatmap by signatures
if (split_heatmap != "none") {
if (!(split_heatmap %in% colnames(annotationSignature))) {
stop("The column specified in 'split_heatmap' must be in the matrix or data.frame
provided by 'annotationSignature'")
}
}
ann_data <- annotationSignature[annotationSignature[, 1] %in%
signatureColNames, ]
ann_data <- ann_data[order(signatureColNames), ]
if (split_heatmap == "none") {
row_split_pass <- c()
} else {
row_split_pass <- ann_data[, split_heatmap]
}
if (!is.null(annotationData)) {
if (length(colList) == 0){
colorSetNum <- 1
for (annot in annotationColNames){
if (is.numeric(annotationData[, annot])){
t1min <- min(annotationData[, annot], na.rm = TRUE)
t1max <- max(annotationData[, annot], na.rm = TRUE)
colList[[annot]] <- circlize::colorRamp2(c(t1min, t1max),
c("white", "blue"))
} else {
if (is.factor(annotationData[, annot][!is.na(annotationData[, annot])])){
condLevels <- levels(annotationData[, annot][!is.na(annotationData[, annot])])
} else {
condLevels <- unique(annotationData[, annot][!is.na(annotationData[, annot])])
}
if (length(condLevels) > 8){
colors <- distinctColors(length(condLevels))
} else {
colors <- RColorBrewer::brewer.pal(8, colorSets[colorSetNum])
colorSetNum <- colorSetNum + 1
}
colList[[annot]] <- stats::setNames(colors[seq_along(condLevels)],
condLevels)
}
}
}
topha2 <- ComplexHeatmap::HeatmapAnnotation(
df = data.frame(annotationData),
col = colList, height = grid::unit(0.4 * length(annotationColNames), "cm"),
show_legend = TRUE, show_annotation_name = TRUE)
return(ComplexHeatmap::draw(
ComplexHeatmap::Heatmap(sigresults, column_title = name,
show_column_names = showColumnNames,
col = choose_color,
show_row_names = showRowNames,
top_annotation = topha2, name = keyname,
row_split = row_split_pass, ...),
annotation_legend_side = "bottom"))
}
}
#' Plot a boxplot of signature genes.
#'
#' @param inputData an input data object. It should either be of the class
#' \code{SummarizedExperiment} and contain the profiled signature data and
#' annotation data as columns in the \code{colData}, or alternatively be of the
#' classes \code{data.frame} or \code{matrix} and contain only the gene
#' expression data. Required.
#' @param annotationData a \code{data.frame} or \code{matrix} of annotation data,
#' with one column. Only required if \code{inputData} is a \code{data.frame} or
#' \code{matrix} of signature data.
#' @param signatureColNames a \code{vector} of the column names in \code{colData}
#' that contain the signature data. Only required if \code{inputData} is a
#' \code{SummarizedExperiment} object.
#' @param annotationColName a character string naming the column name in the
#' \code{colData} that contains the annotation data to be used in making the
#' boxplot. Only required if inputData is a \code{SummarizedExperiment} object.
#' @param name a character string giving the title of the boxplot. The default
#' is \code{"Signatures"}.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{FALSE}.
#' @param includePoints logical. If \code{TRUE}, points will be included over
#' the boxplots. The default is \code{TRUE}.
#' @param notch logical. Notches are used to compare groups; if the notches of
#' two boxes do not overlap, this suggests that the medians are significantly
#' different. If \code{TRUE}, the boxplot will be notched. The default is
#' \code{FALSE}.
#' @param rotateLabels logical. If \code{TRUE}, the x-axis labels will be
#' rotated. The default is \code{FALSE}.
#' @param nrow integer giving the number of rows in the resulting array.
#' @param ncol integer giving the number of columns in the resulting array.
#' @param fill_colors a vector of color names to be used as the fill colors for
#' the boxplot. If \code{NULL}, colors will be supplied via RColorBrewer.
#' The default is \code{fill_colors = NULL}.
#'
#' @return A \code{ggplot2} boxplot of the signature data using the provided
#' annotation information.
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#'
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#'
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#'
#' # Run profiler using GSVA and ssGSEA on Zak_RISK_16 signature
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#' signatureBoxplot(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColName = "sample", name = "Zak_RISK_16 Signature")
signatureBoxplot <- function(inputData, annotationData, signatureColNames,
annotationColName, name = "Signatures",
scale = FALSE, includePoints = TRUE,
notch = FALSE, rotateLabels = FALSE, nrow = NULL,
ncol = NULL, fill_colors = NULL) {
if (methods::is(inputData, "SummarizedExperiment")){
if (any(duplicated(signatureColNames))){
stop("Duplicate signature column name is not supported.")
}
if (!all(signatureColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Signature column name not found in inputData.")
}
if (!all(annotationColName %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Annotation column name not found in inputData.")
}
annotationData <- data.frame(
SummarizedExperiment::colData(inputData)[, annotationColName,
drop = FALSE])
inputData <- data.frame(
SummarizedExperiment::colData(inputData)[, signatureColNames,
drop = FALSE])
} else {
if (ncol(annotationData) != 1){
stop("annotationData must have only one column.")
}
annotationColName <- colnames(annotationData)
}
if (length(annotationColName) != 1){
stop("You must specify a single annotation column name to color boxplots by.")
}
if (!is.factor(annotationData[, 1])) {
annotationData[, 1] <- as.factor(annotationData[, 1])
}
n <- length(levels(annotationData[, 1]))
if (n > 9){
stop("Too many levels in the annotation data. The boxplot can contain a maximum of 9 levels")
}
# if number of rows equal number of row names
if (nrow(annotationData) == nrow(inputData)){
if (!all(rownames(annotationData) == rownames(inputData))){
stop("Annotation data and signature data does not match.")
}
} else if (nrow(annotationData) == ncol(inputData)){
if (!all(rownames(annotationData) == colnames(inputData))){
stop("Annotation data and signature data does not match.")
}
inputData <- t(inputData)
} else {
stop("Annotation data and signature data does not match.")
}
pathwaydata <- t(inputData)
if (scale) {
pathwaydata <- t(scale(t(pathwaydata)))
}
boxplotdf <- data.frame(t(pathwaydata),
Group = annotationData[, 1])
boxplotdfm <- reshape2::melt(boxplotdf, value.name = "Score",
variable.name = "Signature",
id.vars = "Group")
theplot <- ggplot2::ggplot(boxplotdfm,
ggplot2::aes_string("Group", "Score")) +
ggplot2::facet_wrap(~Signature, scales = 'free',
nrow = nrow, ncol = ncol) +
ggplot2::geom_boxplot(outlier.shape = NA,
ggplot2::aes_string(fill = "Group"),
notch = notch) +
ggplot2::theme_classic()
if (includePoints) {
theplot <- theplot + ggplot2::geom_point(position = ggplot2::
position_jitter(width = 0.1))
}
if (rotateLabels) {
theplot <- theplot + ggplot2::theme(axis.text.x = ggplot2::
element_text(angle = 90, hjust = 1))
}
if (is.null(fill_colors)) {
if (n < 3) n <- 3
fill_colors <- RColorBrewer::brewer.pal(n, "Set1")
}
return(theplot +
ggplot2::scale_fill_manual(values = fill_colors) +
ggplot2::ggtitle(name))
}
#' Plot a heatmap of a single signature score with individual gene expression levels.
#'
#' This function takes the profiled gene expression data for a single signature
#' and creates a heatmap based on the expression scores.
#'
#' @inheritParams signatureHeatmap
#' @param inputData a \code{SummarizedExperiment} object containing the profiled
#' signature data and annotation data as columns in the \code{colData}.
#' Required.
#' @param useAssay a character string specifying the assay to use for the gene
#' expression data. Required.
#' @param sigGenes a vector identifying the genes in the signature to use in
#' the heatmap. For inbuilt signatures, you can use \code{TBsignatures}
#' (e.g., \code{TBsignatures[["ACS_COR"]]}). Required.
#' @param name a character string with the plot title of the heatmap. The
#' default is \code{"Signatures"}.
#' @param signatureColNames a vector of the column names in the \code{colData}
#' that contain the signature data. Required.
#' @param annotationColNames a vector of the column names in the \code{colData}
#' that contain the annotation data. If \code{NULL}, no annotation bar besides
#' those of the scoring algorithms will be drawn on the heatmap. The default
#' is \code{NULL}.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{TRUE}.
#' @param showColumnNames logical. Setting \code{showColumnNames = TRUE} will
#' show the column names (i.e. sample names) on the heatmap. The default is
#' \code{TRUE}.
#' @param showRowNames logical. Setting \code{showColumnNames = TRUE} will
#' show the row names (i.e. signature names) on the heatmap. The default is
#' \code{TRUE}.
#' @param colList a named \code{list} of named vectors specifying custom color
#' information to pass to \code{ComplexHeatmap::Heatmap()}.
#' The list should have as many elements as there are annotation columns
#' and gene signatures (i.e. \code{sigGenes}), and each element name should
#' correspond exactly with the name of each annotation column/signature.
#' The colors in the vector elements should be named according to the
#' levels of the factor in that column's annotation data if the annotation
#' is discrete, or it should be produced with \code{circlize::colorRamp2}
#' if the annotation/gene is continuous.
#' By default, \code{ColorBrewer} color sets will be used.
#' See the the parameter \code{colorSets} for additional details.
#' @param ... Additional parameters to pass to \code{ComplexHeatmap::Heatmap()}.
#'
#' @return A \code{ComplexHeatmap} plot.
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#'
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#' # Run profiler using GSVA and ssGSEA on Zak_RISK_16
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#'
#' # Plot a heatmap of signature genes and pathway predictions
#' signatureGeneHeatmap(res, useAssay = "data",
#' sigGenes = TBsignatures[["Zak_RISK_16"]],
#' signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = c("sample"), showColumnNames = FALSE,
#' name = "Zak_RISK_16")
signatureGeneHeatmap <- function(inputData, useAssay, sigGenes,
name = "Signature", signatureColNames = NULL,
annotationColNames = NULL, scale = TRUE,
showColumnNames = TRUE, showRowNames = TRUE,
colList = list(), colorSets = c("Set1", "Set2",
"Set3", "Pastel1", "Pastel2", "Accent",
"Dark2", "Paired"),
choose_color = c("blue", "gray95", "red"),
...) {
if (!is.null(signatureColNames)) {
pathwaycols <- list()
pathwaydata <- data.frame(SummarizedExperiment::
colData(inputData)[, signatureColNames,
drop = FALSE])
for (i in colnames(pathwaydata)) {
t1min <- min(pathwaydata[, i], na.rm = TRUE)
t1max <- max(pathwaydata[, i], na.rm = TRUE)
pathwaycols[[i]] <- circlize::colorRamp2(c(t1min,
mean(c(t1min, t1max)),
t1max),
c("darkgreen",
"white",
"darkorange"))
}
} else {
pathwaycols <- NULL
pathwaydata <- NULL
}
heatdata <- SummarizedExperiment::assay(
inputData, useAssay)[sigGenes[sigGenes %in% rownames(inputData)], ]
heatname <- useAssay
if (scale) {
heatdata <- heatdata[rowSums(heatdata, na.rm = TRUE) != 0, ]
heatdata <- t(scale(t(heatdata)))
heatname <- paste("Scaled", heatname, sep = "\n")
}
if (!is.null(annotationColNames)) {
annotationData <- data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE])
if (length(colList) == 0){
colorSetNum <- 1
for (annot in annotationColNames){
if (is.numeric(annotationData[, annot])){
t1min <- min(annotationData[, annot], na.rm = TRUE)
t1max <- max(annotationData[, annot], na.rm = TRUE)
colList[[annot]] <- circlize::colorRamp2(c(t1min, t1max),
c("white", "blue"))
} else {
if (is.factor(annotationData[, annot][!is.na(annotationData[, annot])])){
condLevels <- levels(
annotationData[, annot][!is.na(annotationData[, annot])])
} else {
condLevels <- unique(
annotationData[, annot][!is.na(annotationData[, annot])])
}
if (length(condLevels) > 8){
colors <- distinctColors(length(condLevels))
} else {
colors <- RColorBrewer::brewer.pal(8, colorSets[colorSetNum])
colorSetNum <- colorSetNum + 1
}
colList[[annot]] <- stats::setNames(colors[seq_along(condLevels)],
condLevels)
}
}
} else {
if (any(annotationColNames != names(colList))) {
stop("The colList is out of sync with the annotation columns")
}
}
colList <- c(colList, pathwaycols)
} else {
colList <- pathwaycols
}
if (!is.null(pathwaydata) | !is.null(annotationColNames)) {
if (!is.null(annotationColNames) & !is.null(pathwaydata)) {
annotDF <- cbind(data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE]),
pathwaydata)
} else if (!is.null(annotationColNames)) {
annotDF <- cbind(data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE]))
} else {
annotDF <- pathwaydata
}
topha <- ComplexHeatmap::HeatmapAnnotation(
df = annotDF,
col = colList,
height = grid::unit(0.4 * length(c(annotationColNames,
signatureColNames)), "cm"),
show_legend = TRUE,
show_annotation_name = TRUE)
} else {
topha <- NULL
}
return(ComplexHeatmap::draw(
ComplexHeatmap::Heatmap(
heatdata, show_column_names = showColumnNames,
col = choose_color,
show_row_names = showRowNames, top_annotation = topha,
name = heatname, column_title = name, ...),
annotation_legend_side = "bottom")
)
}
#' Generate a distinct palette for coloring different clusters.
#'
#' Create a distinct palette for coloring different heatmap clusters. The
#' function returns colors for input into \code{ComplexHeatmap:Heatmap()},
#' \code{signatureGeneHeatmap()} and \code{signatureHeatmap()}.
#'
#' @param n an integer describing the number of colors to generate. Required.
#' @param hues a vector of character strings indicating the R colors available
#' from the \code{colors()} function. These will be used as the base colors for
#' the clustering scheme. Different saturations and values (i.e. darkness)
#' will be generated for each hue. Default is \code{c("red", "cyan", "orange",
#' "blue", "yellow", "purple", "green", "magenta")}
#' @param saturation.range a numeric vector of length 2 with values between 0
#' and 1 giving the range of saturation. The default is \code{c(0.25, 1)}.
#' @param value.range a numeric vector of length 2 with values between 0 and 1
#' giving the range of values. The default is \code{c(0.5, 1)}.
#'
#' @return A vector of distinct colors that have been converted to HEX from
#' HSV.
#'
#' @export
#'
#' @examples
#'
#' distinctColors(10)
#'
distinctColors <- function(n, hues = c("red", "cyan", "orange", "blue",
"yellow", "purple", "green", "magenta"),
saturation.range = c(0.7, 1),
value.range = c(0.7, 1)) {
if (!(all(hues %in% grDevices::colors()))) {
stop("Only color names listed in the 'color'",
" function can be used in 'hues'")
}
## Convert R colors to RGB and then to HSV color format
hues.hsv <- grDevices::rgb2hsv(grDevices::col2rgb(hues))
## Calculate all combination of saturation/value pairs.
## Note that low saturation with low value (i.e. high darkness) is too dark
## for all hues. Likewise, high saturation with high value (i.e. low darkness)
## is hard to distinguish. Therefore, saturation and value are set to be
## anticorrelated.
num.vs <- ceiling(n / length(hues))
s <- seq(from = saturation.range[1], to = saturation.range[2],
length = num.vs)
v <- seq(from = value.range[2], to = value.range[1], length = num.vs)
## Create all combinations of hues with saturation/value pairs
new.hsv <- c()
for (i in seq_len(num.vs)) {
temp <- rbind(hues.hsv[1, ], s[i], v[i])
new.hsv <- cbind(new.hsv, temp)
}
## Convert to HEX
col <- grDevices::hsv(new.hsv[1, ], new.hsv[2, ], new.hsv[3, ])
return(col[seq_len(n)])
}
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Defines functions distinctColors signatureGeneHeatmap signatureBoxplot signatureHeatmap
Documented in distinctColors signatureBoxplot signatureGeneHeatmap signatureHeatmap
globalVariables(c("BS_AUC", "FPR", "LowerTPR", "Signatures",
"TBsignatures", "TPR", "UpperTPR", "sigAnnotData"))
#' Plot a heatmap of signature scores.
#'
#' This function takes a dataset of scored gene expression data as an input
#' and returns a ComplexHeatmap plot for for visual comparison of
#' signature performance.
#'
#' If both \code{annotationData = NULL} and \code{annotationColNames = NULL},
#' no annotation bar will be drawn on the heatmap.
#'
#' @param inputData an input data object. It should either be of the class
#' \code{SummarizedExperiment} and contain the profiled signature data and
#' annotation data as columns in the colData, or alternatively be of the classes
#' \code{data.frame} or \code{matrix} and contain only the gene expression data.
#' Required.
#' @param annotationData a \code{data.frame} or \code{matrix} of annotation
#' data, with one column. Only required if \code{inputData} is a
#' \code{data.frame} or \code{matrix} of signature data.
#' The row names must equal those of the \code{inputData} column names.
#' Default is \code{NULL}.
#' @param name a character string with the plot title of the heatmap. The
#' default is \code{"Signatures"}.
#' @param signatureColNames a vector of the column names in \code{colData} that
#' contain the signature data. Only required if \code{inputData} is a
#' SummarizedExperiment object.
#' @param annotationColNames a vector of the column names in \code{colData} that
#' contain the annotation data. Only required if \code{inputData} is a
#' \code{SummarizedExperiment}. Default is \code{NULL}.
#' @param colList a named \code{list} of named vectors specifying custom color
#' information to
#' pass to \code{ComplexHeatmap::Heatmap()}. The list should have as many
#' elements as there are annotation columns, and each element name should
#' correspond exactly with the name of each annotation column.
#' The colors in the vector elements should be named according to the
#' levels of the factor in that column's annotation data if the annotation
#' is discrete, or it should be produced with \code{circlize::colorRamp2}
#' if the annotation is continuous.
#' By default, \code{ColorBrewer} color sets will be used.
#' See the the parameter \code{colorSets} for additional details.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{FALSE}.
#' @param showColumnNames logical. Setting \code{showColumnNames = TRUE} will
#' show the column names (i.e. sample names) on the heatmap. The default is
#' \code{TRUE}.
#' @param showRowNames logical. Setting \code{showColumnNames = TRUE} will
#' show the row names (i.e. signature names) on the heatmap. The default is
#' \code{TRUE}.
#' @param colorSets a vector of names listing the color sets in the order
#' that they should be used in creating the heatmap. By default, this function
#' will use the color sets in the order listed in \code{Usage} for annotation
#' information. You may replace the default with the same collection of sets
#' in order that you want to use them, or provide custom color sets with the
#' \code{colList} parameter.
#' @param choose_color a vector of color names to be interpolated for the
#' heatmap gradient, or a \code{colorRamp} function produced by
#' \code{circlize::colorRamp2}. The default is \code{c("blue", "gray95", "red")}.
#' @param split_heatmap a character string either giving the column title of
#' \code{annotationSignature} containing annotation data for which to split
#' the heatmap rows (i.e., signatures), or \code{"none"} if no split is desired.
#' The default is \code{"disease"}.
#' @param annotationSignature a \code{data.frame} or \code{matrix} with information
#' to be used
#' in splitting the heatmap. The first column should signature names. The
#' column of annotation information should be specified in \code{split_heatmap.}
#' Other columns will be ignored. The default is \code{sigAnnotData}.
#' @param ... Additional arguments to be passed to
#' \code{ComplexHeatmap::Heatmap()}.
#'
#' @return A ComplexHeatmap plot.
#'
#' @import BiocParallel bioDist readr boot ggfortify e1071
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#' signatureHeatmap(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = "sample", scale = TRUE,
#' showColumnNames = FALSE, split_heatmap = "none")
#'
#' # Example using custom colors for the annotation information
#' color2 <- stats::setNames(c("purple", "black"), c("down", "up"))
#' color.list <- list("sample" = color2)
#'
#' signatureHeatmap(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = "sample", scale = TRUE,
#' showColumnNames = FALSE,
#' colList = color.list, split_heatmap = "none")
#'
signatureHeatmap <- function(inputData, annotationData = NULL, name = "Signatures",
signatureColNames,
annotationColNames = NULL,
colList = list(), scale = FALSE,
showColumnNames = TRUE,
showRowNames = TRUE, colorSets = c("Set1", "Set2",
"Set3", "Pastel1", "Pastel2", "Accent", "Dark2",
"Paired"),
choose_color = c("blue", "gray95", "red"),
split_heatmap = "disease",
annotationSignature = sigAnnotData,
...) {
if (methods::is(inputData, "SummarizedExperiment")){
if (any(duplicated(signatureColNames))){
stop("Duplicate signature column name is not supported.")
}
if (!all(signatureColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Signature column name not found in inputData.")
}
if (!is.null(annotationColNames)) {
if (!all(annotationColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Annotation column name not found in inputData.")
}
annotationData <- SummarizedExperiment::colData(inputData)[, annotationColNames, drop = FALSE]
inputData <- SummarizedExperiment::colData(inputData)[, signatureColNames, drop = FALSE]
}
} else {
if (is.null(annotationData)) {
stop("annotationData must be provided for a data.frame input object.")
} else if (!is.null(annotationData)) {
annotationColNames <- colnames(annotationData)
}
}
if (!is.null(annotationData)) {
if (nrow(annotationData) == nrow(inputData)){
if (!all(rownames(annotationData) == rownames(inputData))){
stop("Annotation data and signature data does not match.")
}
} else if (nrow(annotationData) == ncol(inputData)){
if (!all(rownames(annotationData) == colnames(inputData))){
stop("Annotation data and signature data does not match.")
}
inputData <- t(inputData)
} else {
stop("Annotation data and signature data does not match.")
}
}
sigresults <- t(as.matrix(inputData))
keyname <- "Score"
if (scale){
sigresults <- t(scale(t(sigresults)))
keyname <- "Scaled Score"
}
# To split heatmap by signatures
if (split_heatmap != "none") {
if (!(split_heatmap %in% colnames(annotationSignature))) {
stop("The column specified in 'split_heatmap' must be in the matrix or data.frame
provided by 'annotationSignature'")
}
}
ann_data <- annotationSignature[annotationSignature[, 1] %in%
signatureColNames, ]
ann_data <- ann_data[order(signatureColNames), ]
if (split_heatmap == "none") {
row_split_pass <- c()
} else {
row_split_pass <- ann_data[, split_heatmap]
}
if (!is.null(annotationData)) {
if (length(colList) == 0){
colorSetNum <- 1
for (annot in annotationColNames){
if (is.numeric(annotationData[, annot])){
t1min <- min(annotationData[, annot], na.rm = TRUE)
t1max <- max(annotationData[, annot], na.rm = TRUE)
colList[[annot]] <- circlize::colorRamp2(c(t1min, t1max),
c("white", "blue"))
} else {
if (is.factor(annotationData[, annot][!is.na(annotationData[, annot])])){
condLevels <- levels(annotationData[, annot][!is.na(annotationData[, annot])])
} else {
condLevels <- unique(annotationData[, annot][!is.na(annotationData[, annot])])
}
if (length(condLevels) > 8){
colors <- distinctColors(length(condLevels))
} else {
colors <- RColorBrewer::brewer.pal(8, colorSets[colorSetNum])
colorSetNum <- colorSetNum + 1
}
colList[[annot]] <- stats::setNames(colors[seq_along(condLevels)],
condLevels)
}
}
}
topha2 <- ComplexHeatmap::HeatmapAnnotation(
df = data.frame(annotationData),
col = colList, height = grid::unit(0.4 * length(annotationColNames), "cm"),
show_legend = TRUE, show_annotation_name = TRUE)
return(ComplexHeatmap::draw(
ComplexHeatmap::Heatmap(sigresults, column_title = name,
show_column_names = showColumnNames,
col = choose_color,
show_row_names = showRowNames,
top_annotation = topha2, name = keyname,
row_split = row_split_pass, ...),
annotation_legend_side = "bottom"))
}
}
#' Plot a boxplot of signature genes.
#'
#' @param inputData an input data object. It should either be of the class
#' \code{SummarizedExperiment} and contain the profiled signature data and
#' annotation data as columns in the \code{colData}, or alternatively be of the
#' classes \code{data.frame} or \code{matrix} and contain only the gene
#' expression data. Required.
#' @param annotationData a \code{data.frame} or \code{matrix} of annotation data,
#' with one column. Only required if \code{inputData} is a \code{data.frame} or
#' \code{matrix} of signature data.
#' @param signatureColNames a \code{vector} of the column names in \code{colData}
#' that contain the signature data. Only required if \code{inputData} is a
#' \code{SummarizedExperiment} object.
#' @param annotationColName a character string naming the column name in the
#' \code{colData} that contains the annotation data to be used in making the
#' boxplot. Only required if inputData is a \code{SummarizedExperiment} object.
#' @param name a character string giving the title of the boxplot. The default
#' is \code{"Signatures"}.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{FALSE}.
#' @param includePoints logical. If \code{TRUE}, points will be included over
#' the boxplots. The default is \code{TRUE}.
#' @param notch logical. Notches are used to compare groups; if the notches of
#' two boxes do not overlap, this suggests that the medians are significantly
#' different. If \code{TRUE}, the boxplot will be notched. The default is
#' \code{FALSE}.
#' @param rotateLabels logical. If \code{TRUE}, the x-axis labels will be
#' rotated. The default is \code{FALSE}.
#' @param nrow integer giving the number of rows in the resulting array.
#' @param ncol integer giving the number of columns in the resulting array.
#' @param fill_colors a vector of color names to be used as the fill colors for
#' the boxplot. If \code{NULL}, colors will be supplied via RColorBrewer.
#' The default is \code{fill_colors = NULL}.
#'
#' @return A \code{ggplot2} boxplot of the signature data using the provided
#' annotation information.
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#'
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#'
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#'
#' # Run profiler using GSVA and ssGSEA on Zak_RISK_16 signature
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#' signatureBoxplot(res, signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColName = "sample", name = "Zak_RISK_16 Signature")
signatureBoxplot <- function(inputData, annotationData, signatureColNames,
annotationColName, name = "Signatures",
scale = FALSE, includePoints = TRUE,
notch = FALSE, rotateLabels = FALSE, nrow = NULL,
ncol = NULL, fill_colors = NULL) {
if (methods::is(inputData, "SummarizedExperiment")){
if (any(duplicated(signatureColNames))){
stop("Duplicate signature column name is not supported.")
}
if (!all(signatureColNames %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Signature column name not found in inputData.")
}
if (!all(annotationColName %in% colnames(SummarizedExperiment::colData(inputData)))){
stop("Annotation column name not found in inputData.")
}
annotationData <- data.frame(
SummarizedExperiment::colData(inputData)[, annotationColName,
drop = FALSE])
inputData <- data.frame(
SummarizedExperiment::colData(inputData)[, signatureColNames,
drop = FALSE])
} else {
if (ncol(annotationData) != 1){
stop("annotationData must have only one column.")
}
annotationColName <- colnames(annotationData)
}
if (length(annotationColName) != 1){
stop("You must specify a single annotation column name to color boxplots by.")
}
if (!is.factor(annotationData[, 1])) {
annotationData[, 1] <- as.factor(annotationData[, 1])
}
n <- length(levels(annotationData[, 1]))
if (n > 9){
stop("Too many levels in the annotation data. The boxplot can contain a maximum of 9 levels")
}
# if number of rows equal number of row names
if (nrow(annotationData) == nrow(inputData)){
if (!all(rownames(annotationData) == rownames(inputData))){
stop("Annotation data and signature data does not match.")
}
} else if (nrow(annotationData) == ncol(inputData)){
if (!all(rownames(annotationData) == colnames(inputData))){
stop("Annotation data and signature data does not match.")
}
inputData <- t(inputData)
} else {
stop("Annotation data and signature data does not match.")
}
pathwaydata <- t(inputData)
if (scale) {
pathwaydata <- t(scale(t(pathwaydata)))
}
boxplotdf <- data.frame(t(pathwaydata),
Group = annotationData[, 1])
boxplotdfm <- reshape2::melt(boxplotdf, value.name = "Score",
variable.name = "Signature",
id.vars = "Group")
theplot <- ggplot2::ggplot(boxplotdfm,
ggplot2::aes_string("Group", "Score")) +
ggplot2::facet_wrap(~Signature, scales = 'free',
nrow = nrow, ncol = ncol) +
ggplot2::geom_boxplot(outlier.shape = NA,
ggplot2::aes_string(fill = "Group"),
notch = notch) +
ggplot2::theme_classic()
if (includePoints) {
theplot <- theplot + ggplot2::geom_point(position = ggplot2::
position_jitter(width = 0.1))
}
if (rotateLabels) {
theplot <- theplot + ggplot2::theme(axis.text.x = ggplot2::
element_text(angle = 90, hjust = 1))
}
if (is.null(fill_colors)) {
if (n < 3) n <- 3
fill_colors <- RColorBrewer::brewer.pal(n, "Set1")
}
return(theplot +
ggplot2::scale_fill_manual(values = fill_colors) +
ggplot2::ggtitle(name))
}
#' Plot a heatmap of a single signature score with individual gene expression levels.
#'
#' This function takes the profiled gene expression data for a single signature
#' and creates a heatmap based on the expression scores.
#'
#' @inheritParams signatureHeatmap
#' @param inputData a \code{SummarizedExperiment} object containing the profiled
#' signature data and annotation data as columns in the \code{colData}.
#' Required.
#' @param useAssay a character string specifying the assay to use for the gene
#' expression data. Required.
#' @param sigGenes a vector identifying the genes in the signature to use in
#' the heatmap. For inbuilt signatures, you can use \code{TBsignatures}
#' (e.g., \code{TBsignatures[["ACS_COR"]]}). Required.
#' @param name a character string with the plot title of the heatmap. The
#' default is \code{"Signatures"}.
#' @param signatureColNames a vector of the column names in the \code{colData}
#' that contain the signature data. Required.
#' @param annotationColNames a vector of the column names in the \code{colData}
#' that contain the annotation data. If \code{NULL}, no annotation bar besides
#' those of the scoring algorithms will be drawn on the heatmap. The default
#' is \code{NULL}.
#' @param scale logical. Setting \code{scale = TRUE} scales the signature data.
#' The default is \code{TRUE}.
#' @param showColumnNames logical. Setting \code{showColumnNames = TRUE} will
#' show the column names (i.e. sample names) on the heatmap. The default is
#' \code{TRUE}.
#' @param showRowNames logical. Setting \code{showColumnNames = TRUE} will
#' show the row names (i.e. signature names) on the heatmap. The default is
#' \code{TRUE}.
#' @param colList a named \code{list} of named vectors specifying custom color
#' information to pass to \code{ComplexHeatmap::Heatmap()}.
#' The list should have as many elements as there are annotation columns
#' and gene signatures (i.e. \code{sigGenes}), and each element name should
#' correspond exactly with the name of each annotation column/signature.
#' The colors in the vector elements should be named according to the
#' levels of the factor in that column's annotation data if the annotation
#' is discrete, or it should be produced with \code{circlize::colorRamp2}
#' if the annotation/gene is continuous.
#' By default, \code{ColorBrewer} color sets will be used.
#' See the the parameter \code{colorSets} for additional details.
#' @param ... Additional parameters to pass to \code{ComplexHeatmap::Heatmap()}.
#'
#' @return A \code{ComplexHeatmap} plot.
#'
#' @export
#'
#' @examples
#' library(SummarizedExperiment)
#' # Generate some artificial data that shows a difference in Zak_RISK_16
#' mat_testdata <- rbind(matrix(c(rnorm(80), rnorm(80) + 5), 16, 10,
#' dimnames = list(TBsignatures$Zak_RISK_16,
#' paste0("sample", seq_len(10)))),
#' matrix(rnorm(1000), 100, 10,
#' dimnames = list(paste0("gene", seq_len(100)),
#' paste0("sample", seq_len(10)))))
#'
#' # Create a SummarizedExperiment object that contains the data
#' testdataSE <- SummarizedExperiment(assays = SimpleList(data = mat_testdata),
#' colData = DataFrame(sample =
#' c(rep("down", 5),
#' rep("up", 5))))
#' # Run profiler using GSVA and ssGSEA on Zak_RISK_16
#' res <- runTBsigProfiler(testdataSE, useAssay = "data",
#' signatures = TBsignatures["Zak_RISK_16"],
#' algorithm = c("GSVA", "ssGSEA"), parallel.sz = 1,
#' combineSigAndAlgorithm = TRUE)
#'
#' # Plot a heatmap of signature genes and pathway predictions
#' signatureGeneHeatmap(res, useAssay = "data",
#' sigGenes = TBsignatures[["Zak_RISK_16"]],
#' signatureColNames = c("GSVA_Zak_RISK_16",
#' "ssGSEA_Zak_RISK_16"),
#' annotationColNames = c("sample"), showColumnNames = FALSE,
#' name = "Zak_RISK_16")
signatureGeneHeatmap <- function(inputData, useAssay, sigGenes,
name = "Signature", signatureColNames = NULL,
annotationColNames = NULL, scale = TRUE,
showColumnNames = TRUE, showRowNames = TRUE,
colList = list(), colorSets = c("Set1", "Set2",
"Set3", "Pastel1", "Pastel2", "Accent",
"Dark2", "Paired"),
choose_color = c("blue", "gray95", "red"),
...) {
if (!is.null(signatureColNames)) {
pathwaycols <- list()
pathwaydata <- data.frame(SummarizedExperiment::
colData(inputData)[, signatureColNames,
drop = FALSE])
for (i in colnames(pathwaydata)) {
t1min <- min(pathwaydata[, i], na.rm = TRUE)
t1max <- max(pathwaydata[, i], na.rm = TRUE)
pathwaycols[[i]] <- circlize::colorRamp2(c(t1min,
mean(c(t1min, t1max)),
t1max),
c("darkgreen",
"white",
"darkorange"))
}
} else {
pathwaycols <- NULL
pathwaydata <- NULL
}
heatdata <- SummarizedExperiment::assay(
inputData, useAssay)[sigGenes[sigGenes %in% rownames(inputData)], ]
heatname <- useAssay
if (scale) {
heatdata <- heatdata[rowSums(heatdata, na.rm = TRUE) != 0, ]
heatdata <- t(scale(t(heatdata)))
heatname <- paste("Scaled", heatname, sep = "\n")
}
if (!is.null(annotationColNames)) {
annotationData <- data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE])
if (length(colList) == 0){
colorSetNum <- 1
for (annot in annotationColNames){
if (is.numeric(annotationData[, annot])){
t1min <- min(annotationData[, annot], na.rm = TRUE)
t1max <- max(annotationData[, annot], na.rm = TRUE)
colList[[annot]] <- circlize::colorRamp2(c(t1min, t1max),
c("white", "blue"))
} else {
if (is.factor(annotationData[, annot][!is.na(annotationData[, annot])])){
condLevels <- levels(
annotationData[, annot][!is.na(annotationData[, annot])])
} else {
condLevels <- unique(
annotationData[, annot][!is.na(annotationData[, annot])])
}
if (length(condLevels) > 8){
colors <- distinctColors(length(condLevels))
} else {
colors <- RColorBrewer::brewer.pal(8, colorSets[colorSetNum])
colorSetNum <- colorSetNum + 1
}
colList[[annot]] <- stats::setNames(colors[seq_along(condLevels)],
condLevels)
}
}
} else {
if (any(annotationColNames != names(colList))) {
stop("The colList is out of sync with the annotation columns")
}
}
colList <- c(colList, pathwaycols)
} else {
colList <- pathwaycols
}
if (!is.null(pathwaydata) | !is.null(annotationColNames)) {
if (!is.null(annotationColNames) & !is.null(pathwaydata)) {
annotDF <- cbind(data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE]),
pathwaydata)
} else if (!is.null(annotationColNames)) {
annotDF <- cbind(data.frame(SummarizedExperiment::
colData(inputData)[, annotationColNames,
drop = FALSE]))
} else {
annotDF <- pathwaydata
}
topha <- ComplexHeatmap::HeatmapAnnotation(
df = annotDF,
col = colList,
height = grid::unit(0.4 * length(c(annotationColNames,
signatureColNames)), "cm"),
show_legend = TRUE,
show_annotation_name = TRUE)
} else {
topha <- NULL
}
return(ComplexHeatmap::draw(
ComplexHeatmap::Heatmap(
heatdata, show_column_names = showColumnNames,
col = choose_color,
show_row_names = showRowNames, top_annotation = topha,
name = heatname, column_title = name, ...),
annotation_legend_side = "bottom")
)
}
#' Generate a distinct palette for coloring different clusters.
#'
#' Create a distinct palette for coloring different heatmap clusters. The
#' function returns colors for input into \code{ComplexHeatmap:Heatmap()},
#' \code{signatureGeneHeatmap()} and \code{signatureHeatmap()}.
#'
#' @param n an integer describing the number of colors to generate. Required.
#' @param hues a vector of character strings indicating the R colors available
#' from the \code{colors()} function. These will be used as the base colors for
#' the clustering scheme. Different saturations and values (i.e. darkness)
#' will be generated for each hue. Default is \code{c("red", "cyan", "orange",
#' "blue", "yellow", "purple", "green", "magenta")}
#' @param saturation.range a numeric vector of length 2 with values between 0
#' and 1 giving the range of saturation. The default is \code{c(0.25, 1)}.
#' @param value.range a numeric vector of length 2 with values between 0 and 1
#' giving the range of values. The default is \code{c(0.5, 1)}.
#'
#' @return A vector of distinct colors that have been converted to HEX from
#' HSV.
#'
#' @export
#'
#' @examples
#'
#' distinctColors(10)
#'
distinctColors <- function(n, hues = c("red", "cyan", "orange", "blue",
"yellow", "purple", "green", "magenta"),
saturation.range = c(0.7, 1),
value.range = c(0.7, 1)) {
if (!(all(hues %in% grDevices::colors()))) {
stop("Only color names listed in the 'color'",
" function can be used in 'hues'")
}
## Convert R colors to RGB and then to HSV color format
hues.hsv <- grDevices::rgb2hsv(grDevices::col2rgb(hues))
## Calculate all combination of saturation/value pairs.
## Note that low saturation with low value (i.e. high darkness) is too dark
## for all hues. Likewise, high saturation with high value (i.e. low darkness)
## is hard to distinguish. Therefore, saturation and value are set to be
## anticorrelated.
num.vs <- ceiling(n / length(hues))
s <- seq(from = saturation.range[1], to = saturation.range[2],
length = num.vs)
v <- seq(from = value.range[2], to = value.range[1], length = num.vs)
## Create all combinations of hues with saturation/value pairs
new.hsv <- c()
for (i in seq_len(num.vs)) {
temp <- rbind(hues.hsv[1, ], s[i], v[i])
new.hsv <- cbind(new.hsv, temp)
}
## Convert to HEX
col <- grDevices::hsv(new.hsv[1, ], new.hsv[2, ], new.hsv[3, ])
return(col[seq_len(n)])
}
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