本文介绍了R:降低调色板的色彩饱和度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我正在寻找一个将给定调色板的饱和度降低一定量的函数。例如。想象我有调色板 library(colorRamps) col.palette = colorRampPalette spline)(1000) pie(rep(1,1000),col = col.palette,lty = 0,labels = NA) 有没有任何函数可以在这个 col.palette 颜色矢量上工作,并减少一定量的饱和度,或允许亮度和对比度是否改变? (我试图实现一个彩虹调色板,比标准的饱和度和更平滑的过渡。) 编辑:也刚刚发现的函数 muted in package scales ,或多或少地做我想要的: http://www.inside-r.org/packages/cran/scales/docs/muted 以及Josh O'Brien提到的 colorspace 中的 rainbow_hcl 是更多的静音和同等强度的彩虹我正在寻找: http://www.inside-r.org/packages/cran/colorspace/docs/rainbow_hcl : library(colorspace) pie(rep(1,1000),col = rainbow_hcl(1000,c = 100,l = 60),lty = 0,labels = NA) 解决方案这里有一个函数将按指定比例去除输入颜色向量的饱和度: 库(colorspace)## hsv颜色空间操作库(RColorBrewer)##对于一些示例颜色 ##用于按照指定比例去饱和颜色的函数 desat X←diag(c(1,sat,1))%*%rgb2hsv(col2rgb cols)) hsv(X [1,],X [2,],X [3,])} 下面是一个例子: ##实用程序绘制调色板的函数 ##(来自vignette(hcl-colors)) pal< - function(col,border =light grey,...){n plot(0,0,type =n,xlim = c(0,1),ylim = c(0,1), axes = FALSE, xab =,ylab =,...) rect(0:(n-1)/ n,0,1:n / n,1,col = col,border = border)} ##一些示例颜色 cc cc75 cc50 cc25 ## Plot'em par(mfcol = c ,1),mar = c(0,0,0,0)) pal(cc) pal(cc75) pal(cc50) pal b $ b I am on the lookout for a function that reduces the saturation of a given colour palette by a certain amount. E.g. imagine I have the palettelibrary(colorRamps) col.palette=colorRampPalette(rainbow(13),interpolate ="spline")(1000)pie(rep(1,1000), col=col.palette,lty=0,labels=NA)Is there any function out there that could work on this col.palette colour vector, and reduce the saturation by a certain amount, or allow the brightness and contrast to be changed? (I am trying to achieve a rainbow palette with less saturation and smoother transitions than the standard one)EDIT: also just discovered function muted in package scales that more or less does what I want :http://www.inside-r.org/packages/cran/scales/docs/muted as well as rainbow_hcl in package colorspace mentioned by Josh O'Brien below, which was the kind of more muted and equal intensity rainbow I was looking for :http://www.inside-r.org/packages/cran/colorspace/docs/rainbow_hcl :library(colorspace)pie(rep(1,1000), col=rainbow_hcl(1000,c=100,l=60),lty=0,labels=NA) 解决方案 Here's a function that will desaturate a vector of input colors by a specified proportion:library(colorspace) ## hsv colorspace manipulationslibrary(RColorBrewer) ## For some example colors## Function for desaturating colors by specified proportiondesat <- function(cols, sat=0.5) { X <- diag(c(1, sat, 1)) %*% rgb2hsv(col2rgb(cols)) hsv(X[1,], X[2,], X[3,])}And here's an example of what it looks like in action:## Utility function for plotting color palettes, ## (from vignette("hcl-colors"))pal <- function(col, border = "light gray", ...) { n <- length(col) plot(0, 0, type="n", xlim = c(0, 1), ylim = c(0, 1), axes = FALSE, xlab = "", ylab = "", ...) rect(0:(n-1)/n, 0, 1:n/n, 1, col = col, border = border)}## Some example colorscc <- brewer.pal(9, 'Set1')cc75 <- desat(cc, 0.75)cc50 <- desat(cc, 0.50)cc25 <- desat(cc, 0.25)## Plot 'empar(mfcol = c(4,1), mar = c(0,0,0,0))pal(cc)pal(cc75)pal(cc50)pal(cc25) 这篇关于R:降低调色板的色彩饱和度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
09-18 00:29