如何更改heatmap.2中的颜色键值? [英] How to change the color key value in heatmap.2?

问题描述

如上面的屏幕截图所示，我在这里使用了功能heatmap.2().

As the above screenshot showed, I used the function heatmap.2() here.

如何在颜色编码栏中将"值"更改为任何其他名称?

how can I change 'Value' in the color coded bar to any other name?

一个人只能使用gplots包中的数据:

One can just use the data from gplots package:

 library(gplots)

 data(mtcars)

 x  <- as.matrix(mtcars)

 rc <- rainbow(nrow(x), start=0, end=.3)

 cc <- rainbow(ncol(x), start=0, end=.3)

 heatmap.2(x, key=TRUE)

非常感谢:-)

推荐答案

它是硬编码的.您将需要在代码中进行更改.大约在绘制键的部分的中间，线是:

It's hard-coded. You will need to change it in the code. It appears about midway down the section that draws the key and the line is:

else mtext(side = 1, "Value", line = 2)

这是heatmap.2代码的一部分，它创建密钥(至少直到出现"Value"一词的地方):

This is the section of the heatmap.2 code that creates the key (at least up to the point where the word "Value" appears) :

 if (key) {
        par(mar = c(5, 4, 2, 1), cex = 0.75)
        tmpbreaks <- breaks
        if (symkey) {
            max.raw <- max(abs(c(x, breaks)), na.rm = TRUE)
            min.raw <- -max.raw
            tmpbreaks[1] <- -max(abs(x), na.rm = TRUE)
            tmpbreaks[length(tmpbreaks)] <- max(abs(x), na.rm = TRUE)
        }
        else {
            min.raw <- min(x, na.rm = TRUE)
            max.raw <- max(x, na.rm = TRUE)
        }
        z <- seq(min.raw, max.raw, length = length(col))
        image(z = matrix(z, ncol = 1), col = col, breaks = tmpbreaks, 
            xaxt = "n", yaxt = "n")
        par(usr = c(0, 1, 0, 1))
        lv <- pretty(breaks)
        xv <- scale01(as.numeric(lv), min.raw, max.raw)
        axis(1, at = xv, labels = lv)
        if (scale == "row") 
            mtext(side = 1, "Row Z-Score", line = 2)
        else if (scale == "column") 
            mtext(side = 1, "Column Z-Score", line = 2)
        else mtext(side = 1, "Value", line = 2)
 .... lots more code below

您应该键入heatmap.2，然后将源代码复制到编辑器，然后使用搜索功能查找值".将值"更改为其他内容(用引号引起来)，然后键入heatmap.2 <-并粘贴代码并按回车键. (除非您保存此设置，否则它将仅在会话继续进行的情况下持续存在.)

You should type heatmap.2 , then copy the source code to an editor and then use the search function to find "Value". Change "Value" to something else (in quotes) and then type heatmap.2 <- and paste in the code and hit return. (Unless you save this it will only persist as long as the session continues.)

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