r - 如何使语法正确的名称

Question

我如何修改它以添加_（下划线）代替.（点）作为其默认值。

> make.names(c("a and b", "a-and-b"), unique = TRUE)
[1] "a.and.b"   "a.and.b.1"

I am looking for the following result 
"a_and_b"   "a_and_b_1"

Answer 1

你可以make.names附上gsub：

gsub("\\.", "_", make.names(c("a and b", "a-and-b"), unique = TRUE))
# [1] "a_and_b"   "a_and_b_1"