r - 检查一个数字是否在其他两个数字之间

Question

我正在寻找一个函数来验证一个数字是否在其他两个数字之间。我还需要控制是否要进行严格比较(a

我知道函数between()在 dplyr .然而，我必须知道上下数字。

MyNumber = 8
First = 2
Second = 10
# This will return TRUE
between(MyNumber, lower =  First, upper =  Second)
# But this will return FALSE
between(MyNumber, lower =  Second, upper =  First)
# This will return TRUE. I want it to return FALSE
First = 8
between(MyNumber, lower =  First, upper =  Second)

我需要一个返回 TRUE 的函数不管顺序是什么。

Answer 1

就像是:

between2 <- function(number,bounds) { number > min(bounds) & number < max(bounds)} 
between2(8, c(2,10))
[1] TRUE
between2(8, c(10,2))
[1] TRUE

此功能还处理您添加的条件

between2(8,c(8,10))
[1] FALSE