[R] Strange result when subsetting a data frame based on a character variable

[Jeff Newmiller]

Are you sure that wasn't oh-3 rather than 03?
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Sent from my phone. Please excuse my brevity.

On November 17, 2015 1:57:15 PM PST, peter dalgaard <pdalgd at gmail.com> wrote:
>
>> On 17 Nov 2015, at 20:37 , Bert Gunter <bgunter.4567 at gmail.com>
>wrote:
>> 
>>> 2 == "2"
>> [1] TRUE
>> 
>> ?"=="  says:
>> 
>> "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."
>> 
>>> as.character(99999)
>> [1] "99999"
>>> as.character(100000)
>> [1] "1e+05"
>>> as.character(100000) == "100000"
>> [1] FALSE
>> 
>
>Also notice that, for similar reasons
>
>> 10 > "2"
>[1] FALSE
>
>(At least in most collations. I recently discovered that OSX Finder
>sorted 2dnorm.R between 02-Probability.toc and
>03-Combinatorics-2x2.pdf.)