styleColorBar_divergent: Style DT color bars

In GeneTonic: Enjoy Analyzing And Integrating The Results From Differential Expression Analysis And Functional Enrichment Analysis

Description

Style DT color bars for values that diverge from 0.

Usage

styleColorBar_divergent(data, color_pos, color_neg)

Arguments

data	The numeric vector whose range will be used for scaling the table data from 0-100 before being represented as color bars. A vector of length 2 is acceptable here for specifying a range possibly wider or narrower than the range of the table data itself.
color_pos	The color of the bars for the positive values
color_neg	The color of the bars for the negative values

Details

This function draws background color bars behind table cells in a column, width the width of bars being proportional to the column values and the color dependent on the sign of the value.

A typical usage is for values such as log2FoldChange for tables resulting from differential expression analysis. Still, the functionality of this can be quickly generalized to other cases - see in the examples.

The code of this function is heavily inspired from styleColorBar, and borrows at full hands from an excellent post on StackOverflow - https://stackoverflow.com/questions/33521828/stylecolorbar-center-and-shift-left-right-dependent-on-sign/33524422#33524422

Value

This function generates JavaScript and CSS code from the values specified in R, to be used in DT tables formatting.

Examples

data(res_de_macrophage, package = "GeneTonic")
res_df <- deseqresult2df(res_macrophage_IFNg_vs_naive)
library("magrittr")
library("DT")
DT::datatable(res_df [1:50, ],
              options = list(
                pageLength = 25,
                columnDefs = list(
                  list(className = "dt-center", targets = "_all")
                )
              )
) %>%
  formatRound(columns = c("log2FoldChange"), digits = 3) %>%
  formatStyle(
    "log2FoldChange",
    background = styleColorBar_divergent(res_df$log2FoldChange,
                                         scales::alpha("navyblue", 0.4),
                                         scales::alpha("darkred", 0.4)),
    backgroundSize = "100% 90%",
    backgroundRepeat = "no-repeat",
    backgroundPosition = "center"
  )


simplest_df <- data.frame(
  a = c(rep("a",9)),
  value = c(-4, -3, -2, -1, 0, 1, 2, 3, 4)
)

# or with a very simple data frame
DT::datatable(simplest_df) %>%
  formatStyle(
    'value',
    background = styleColorBar_divergent(simplest_df$value,
                                         scales::alpha("forestgreen", 0.4),
                                         scales::alpha("gold", 0.4)),
    backgroundSize = "100% 90%",
    backgroundRepeat = "no-repeat",
    backgroundPosition = "center"
  )

GeneTonic documentation built on Nov. 8, 2020, 5:27 p.m.