map2color: Maps numeric values to color values

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

Maps numeric values to color values

Description

Maps numeric continuous values to values in a color palette

Usage

map2color(x, pal, symmetric = TRUE, limits = NULL)

Arguments

x	A character vector of numeric values (e.g. log2FoldChange values) to be converted to a vector of colors
pal	A vector of characters specifying the definition of colors for the palette, e.g. obtained via RColorBrewer::brewer.pal()
symmetric	Logical value, whether to return a palette which is symmetrical with respect to the minimum and maximum values - "respecting" the zero. Defaults to TRUE.
limits	A vector containing the limits of the values to be mapped. If not specified, defaults to the range of values in the x vector.

Value

A vector of colors, each corresponding to an element in the original vector

Examples

a <- 1:9
pal <- RColorBrewer::brewer.pal(9, "Set1")
map2color(a, pal)
plot(a, col = map2color(a, pal), pch = 20, cex = 4)

b <- 1:50
pal2 <- grDevices::colorRampPalette(
  RColorBrewer::brewer.pal(name = "RdYlBu", 11)
)(50)
plot(b, col = map2color(b, pal2), pch = 20, cex = 3)

federicomarini/GeneTonic documentation built on Dec. 21, 2024, 10:05 p.m.