Hi R users
Is there anything wrong in "is" function? (R 2.7.2)
I believe that everyone will agree that "7" is an integer, right? but
why R shows 7 is not an integer
is.integer(7)
[1] FALSE
is(7,"integer")
[1] FALSE
is(as.integer(7), "integer")
[1] TRUE
Thank you very much in advance
Chunhao
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