将两个不同长度的字符向量粘贴在一起

Question

我在 R 中有两个不同的字符向量，我想将它们组合起来用于列名称：

groups <- c("Group A", "Group B")
label <- c("Time","Min","Mean","Max")

当我尝试使用粘贴时，我得到结果：

> paste(groups,label)
[1] "Group A Time" "Group B Min"  "Group A Mean" "Group B Max"

是否有一个简单的函数或设置可以将它们粘贴在一起以获得以下输出？

[1] "Group A Time" "Group A Min"  "Group A Mean" "Group A Max"  "Group B Time"
[6] "Group B Min"  "Group B Mean" "Group B Max" 

Answer 1

也许 outer 对您的工作有帮助。试试这个：

> c(t(outer(groups, label, paste)))
[1] "Group A Time" "Group A Min"  "Group A Mean" "Group A Max"  "Group B Time" "Group B Min" 
[7] "Group B Mean" "Group B Max" 

Answer 2

outer

外部（组、标签、FUN=粘贴）

Answer 3

由于它是两个元素数组，我会这样做

 c(paste(groups[1],label),paste(groups[2],label))