R语言两组变量特征相关关系热图绘制画法

> # 导入数据及数据预处理
> setwd("D:/weixin/")
> rows <- read.csv("rows.csv")
> cols <- read.csv("cols.csv")
> str(rows)
'data.frame':   100 obs. of  6 variables:
 $ r1: num  476 482 640 452 308 ...
 $ r2: num  2059 1987 1952 1927 1854 ...
 $ r3: num  513 601 682 497 463 ...
 $ r4: num  2235 2114 2038 1945 1916 ...
 $ r5: num  433 376 525 395 238 ...
 $ r6: num  2028 1943 1802 1775 1748 ...
> str(cols)
'data.frame':   100 obs. of  5 variables:
 $ c1: num  2387 2437 2484 2349 2198 ...
 $ c2: num  540 535 706 509 359 ...
 $ c3: num  472 610 465 473 471 ...
 $ c4: num  74.4 57.3 49.5 51.8 47.6 ...
 $ c5: num  995 915 1038 794 652 ...

> # 构建相关关系矩阵
> library(psych)
> data.corr <- corr.test(rows, cols, method="pearson", adjust="fdr")
> data.r <- data.corr$r  # 相关系数
> data.p <- data.corr$p  # p值
> 
> # 画热图
> library(pheatmap)
> pheatmap(data.r, clustering_method="average")

> pheatmap(data.r, clustering_method="average", cluster_rows=F)

> data.r.fmt <- matrix(sprintf("%.2f", data.r), nrow=nrow(data.p))  # 只保留小数点后两位
> pheatmap(data.r, clustering_method="average", cluster_rows=F, display_numbers=data.r.fmt)

> getSig <- function(dc) {
+   sc <- ''
+   if (dc < 0.01) sc <- '***'
+   else if (dc < 0.05) sc <- '**'
+   else if (dc < 0.1) sc <- '*'
+   sc
+ }
> sig.mat <- matrix(sapply(data.p, getSig), nrow=nrow(data.p))
> str(sig.mat)
 chr [1:6, 1:5] "*" "***" "" "***" "***" "***" "***" "" "***" "**" ...
> pheatmap(data.r, clustering_method="average", cluster_rows=F, display_numbers=sig.mat)

> pheatmap(data.r, clustering_method="complete", cluster_rows=F, display_numbers=sig.mat, main="Corr Heatmap")