关闭r中的区分大小写 [英] turning off case sensitivity in r

问题描述

我在区分大小写方面遇到困难。我们可以关闭它吗？

I am having difficulty with case sensitivity. Can we turn it off?

A1 <- c("a", "A", "a", "a", "A", "A", "a")
B1 <- c(rep("a", length(A1)))

A1 == B1
# [1]  TRUE FALSE  TRUE  TRUE FALSE FALSE  TRUE

应全部为 TRUE

推荐答案

无法关闭 =的区分大小写= ，但是将两个字符向量都强制转换为大写字母，然后然后测试是否相等：

There's no way to turn off case sensitivity of ==, but coercing both character vectors to uppercase and then testing for equality amounts to the same thing:

toupper(A1)
[1] "A" "A" "A" "A" "A" "A" "A"

toupper(A1)==toupper(B1)
# [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE

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