为什么"hello"> 0返回TRUE？

Question

试试吧:

"hello" > 0

我尝试过使用,as.numeric("hello")但它只是让我回来了NA.是什么赋予了？

Answer 1

因为0被胁迫"0".见help(">"):

 If the two arguments are atomic vectors of different types, one is
 coerced to the type of the other, the (decreasing) order of
 precedence being character, complex, numeric, integer, logical and
 raw.