如何以百分比形式显示关联矩阵

Question

I am trying to display the correlation labels as a percentage instead of displaying them between the numbers -1 and 1. I was able to do this using the package ggcorrplot , However doing this took away the capability of displaying them with the color pallet and display it with just a grey cell colors. This is how it looks like

I was able to do this using the package ggcorrplot , However doing this took away the capability of displaying them with the color pallet.

#if(!require(devtools)) install.packages("devtools")
#devtools::install_github("kassambara/ggcorrplot")
library(ggcorrplot)
corr <- round(cor(test3),3)
corr <- corr * 100
ggcorrplot(corr, hc.order = TRUE, type = "lower",
           lab = TRUE, colors = c("blue", "white", "red"))

Is there way to get the results as a percentage and still have the colors as we normally have in a correlation matrix plot. Also any way to add percentage to the labels as currently it only displays the number.

Thanks a lot in advance !!

Answer 1

corr <- round(cor(mtcars)^2,3)
corr <- corr * 100

diag(corr) = NA
corr[upper.tri(corr)] = NA

library(reshape2)
d = melt(corr)
d = d[!is.na(d$value),]

library(ggplot2)
ggplot(d, aes(x = Var1,
              y = Var2,
              fill = value,
              label = ifelse(is.na(value), "", paste0(value,"%")))) +
    geom_tile(color = "white") +
    scale_fill_gradientn(colors = c("green", "white", "red"), na.value = NA) +
    geom_text() +
    theme_bw()