检查列表以找出R中的所有值都相同(Check List to find out all values are same in R)

检查列表以找出R中的所有值都相同(Check List to find out all values are same in R)

我的清单如下

l = list(c("a", "b", "c"), c("a", "b", "c"), c("a", "b", "c"))

我想使用apply family函数检查它们中的每一个是否包含相同的值。

我想要下面的答案

TRUE, TRUE, TRUE

I have list as follows

l = list(c("a", "b", "c"), c("a", "b", "c"), c("a", "b", "c"))

I want to check that each of them contain same values using apply family functions.

I want following answer

TRUE, TRUE, TRUE

最满意答案

我们可以使用duplicated

duplicated(l)|duplicated(l, fromLast=TRUE) #[1] TRUE TRUE TRUE

如果我们需要比较list元素的所有组合， combn是另一种方式

combn(seq_along(l), 2, FUN= function(x) all(l[[x[1]]] == l[[x[2]]])) #[1] TRUE TRUE TRUE

We can use duplicated

duplicated(l)|duplicated(l, fromLast=TRUE) #[1] TRUE TRUE TRUE

If we need to compare all the combinations of list elements, combn is another way

combn(seq_along(l), 2, FUN= function(x) all(l[[x[1]]] == l[[x[2]]])) #[1] TRUE TRUE TRUE