r - 更改修改后的 ggpairs 图的轴标签(相关热图)

Question

我想结合一个 ggpairs用热图绘制并找到了一个很好的解决方案:
ggpairs plot with heatmap of correlation values

#library
library(GGally)
library(ggplot2)

#data
sample_df <- data.frame(replicate(7,sample(0:5000,100)))
colnames(sample_df) <- c("KUM", "MHP", "WEB", "OSH", "JAC", "WSW", "gaugings")

#function for heatmap
my_fn <- function(data, mapping, method="p", use="pairwise", ...){

          # grab data
          x <- eval_data_col(data, mapping$x)
          y <- eval_data_col(data, mapping$y)

          # calculate correlation
          corr <- cor(x, y, method=method, use=use)

          # calculate colour based on correlation value
          # Here I have set a correlation of minus one to blue, 
          # zero to white, and one to red 
          # Change this to suit: possibly extend to add as an argument of `my_fn`
          colFn <- colorRampPalette(c("blue", "white", "red"), interpolate ='spline')
          fill <- colFn(100)[findInterval(corr, seq(-1, 1, length=100))]

          ggally_cor(data = data, mapping = mapping, ...) + 
            theme_void() +
            theme(panel.background = element_rect(fill=fill))
        }

#combine
ggpairs(sample_df, 
                   upper = list(continuous = my_fn),
                   lower = list(continuous = "smooth"))

因为轴标签不适合我的真实数据，我想改变它们(角度)，我找到了这个解决方案:

ggpairs rotate axis label

但是，如果我添加它，我会丢失热图

ggpairs(sample_df,
        upper = list(continuous = my_fn),
        lower = list(continuous = "smooth")) +
        theme(axis.text.x = element_text(angle = 90, hjust = 1, size=8))

我也尝试将主题添加到 my_fn ， 没有成功。

Answer 1

怎么样:

  ggpairs(sample_df, 
        upper = list(continuous = my_fn),
        lower = list(continuous = "smooth"))+
  theme(axis.text.x = element_text(angle = 90, hjust = 1, size=8))

软件包版本:ggplot2 3.3.0、GGally 1.4.0