从Data.Frame连接行和列名称

Question

是否有办法将现有data.frame中的行名和列名连接到新数据框中。例如，我有（A，B，C）的列名和（1,2,3）的行名，我想将它们组合成一个3x3矩阵[A1，B1，C1; A2，B2，C2; A2，B2，C2]。谢谢你的帮助

Answer 1

outer()功能可以提供帮助：

> cn <- c("A","B","C")
> rn <- c("1","2","3")
> outer(cn, rn, function(x,y) paste(x,y,sep=""))
     [,1] [,2] [,3]
[1,] "A1" "A2" "A3"
[2,] "B1" "B2" "B3"
[3,] "C1" "C2" "C3"
>