a <- matrix(c(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15),nrow=3,ncol=5)
c <- matrix(c(2,3,3,3,3,4,4,4,4,8,8,8),nrow=3,ncol=4)
rownames(a)<-c("aa","cc","kk")
rownames(c)<-c("dd","cc","ee")
> a
[,1] [,2] [,3] [,4] [,5]
aa 1 4 7 10 13
cc 2 5 8 11 14
kk 3 6 9 12 15
> c
[,1] [,2] [,3] [,4]
dd 2 3 4 8
cc 3 3 4 8
ee 3 4 4 8
> rownames(c)
[1] "dd" "cc" "ee"
> rownames(c) %in% rownames(a)
[1] FALSE TRUE FALSE
> which(rownames(c) %in% rownames(a))
[1] 2
> a[which(rownames(c) %in% rownames(a)),]
[1] 2 5 8 11 14
> c[which(rownames(c) %in% rownames(a)),]
[1] 3 3 4 8
标签：匹配,14,cc,dd,矩阵,FALSE,rownames,in% From： https://www.cnblogs.com/stelladi/p/17287819.html