R if else声明问题

Question

When I run this very simple code

c <- seq(0, 1, length.out=4)
x <- 0.5
for (l in 1:length(c)) {
    if (l>1 & x>c[l-1] & x<c[l]) {
        print(x)
    }
}

I have the following error in the console

Error in if ((l > 1 & x > c[l - 1] & x < c[l])) { : 
  argument is of length zero

The most interesting part is that if try to create a logical variable with the "if" condition, everything works fine:

> (l>1 & x>c[l-1] & x<c [l])
logical(0)

What am I doing wrong?

Answer 1

That was a stupid mistake. According to this replacing & with && would solve the issue for my case.