[R] identical() versus sapply()

[Jeff Newmiller]

I highly recommend making friends with the str function. Try

str( 1 )
str( 1:2 )

for the clue you need, and then

sapply( 1:2, identical, 1L )

-- 
Sent from my phone. Please excuse my brevity.

On April 8, 2016 3:24:31 PM PDT, "Paulson, Ariel" <apa at stowers.org> wrote:
>Sorry if this has been answered elsewhere, but I can't find any
>discussion of it.
>
>Wondering why the following situation occurs (duplicated on 3.2.2
>CentOS6 and 3.0.1 Win2k, so I don't think it is a bug):
>
>> sapply(1, identical, 1)
>[1] TRUE
>
>> sapply(1:2, identical, 1)
>[1] FALSE FALSE
>
>> sapply(1:2, function(i) identical(as.numeric(i),1) )
>[1]  TRUE FALSE
>
>> sapply(1:2, function(i) identical(as(i,"numeric"),1) )
>[1] FALSE FALSE
>
>I have been unable to find anything different about the versions of "1"
>that identical() is not finding identical.
>
>Thanks,
>Ariel
>
>
>
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