corrplot绘图lable如何更改上下标签

corrplot绘图的text label不能用label参数，对相关矩阵的colname和rowname进行更改就

上下标签可以用 ":", "=" or "$".

下标：":a[0]"

上标：":a^'+'"  注意，上标要放在单引号里面

M <- cor(mtcars)[1:5,1:5]

colnames(M) <- c("alpha", ":beta^'+'", ":alpha+beta", ":a[0]", "=a[beta]")

rownames(M) <- c("alpha", "beta", NA, "$a[0]", "$ a[beta]")

corrplot::corrplot(M)