Microarray color palette
This function returns a vector of color names corresponding to a range of colors specified in the arguments.
maPalette(low = "white", high = c("green", "red"), mid=NULL, k =50)low |
Color for the lower end of the color palette, specified using any of the three kinds of R colors, i.e., either a color name (an element of |
high |
Color for the upper end of the color palette, specified
using any of the three kinds of R colors, i.e., either a color name
(an element of |
mid |
Color for the middle portion of the color palette, specified using any of the three kinds of R colors, i.e., either a color name (an element of |
k |
Number of colors in the palette. |
A "character" vector of color names. This can be used to create a user-defined color palette for subsequent graphics by palette, in a col= specification in graphics functions, or in par.
Sandrine Dudoit, http://www.stat.berkeley.edu/~sandrine, Yee Hwa (Jean) Yang.
S. Dudoit and Y. H. Yang. (2002). Bioconductor R packages for exploratory analysis and normalization of cDNA microarray data. In G. Parmigiani, E. S. Garrett, R. A. Irizarry and S. L. Zeger, editors, The Analysis of Gene Expression Data: Methods and Software, Springer, New York.
par(mfrow=c(1,4)) pal <- maPalette(low="red", high="green") maColorBar(seq(-2,2, 0.2), col=pal, horizontal=FALSE, k=21) pal <- maPalette(low="red", high="green", mid="yellow") maColorBar(seq(-2,2, 0.2), col=pal, horizontal=FALSE, k=21) pal <- maPalette() maColorBar(seq(-2,2, 0.2), col=pal, horizontal=FALSE, k=21) pal <- maPalette(low="purple", high="purple",mid="white") maColorBar(seq(-2,2, 0.2), col=pal, horizontal=FALSE, k=21)
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