The conversion seems to be controlled by the scipen setting:
> options("scipen")
$scipen
[1] 0
> as.character(100000)
[1] "1e+05"
> options(scipen=5)
> as.character(100000)
[1] "100000"
> as.character(1000000)
[1] "1000000"
> as.character(10000000)
[1] "10000000"
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of peter dalgaard
Sent: Tuesday, November 17, 2015 3:57 PM
To: Bert Gunter
Cc: r-help
Subject: Re: [R] Strange result when subsetting a data frame based on a
character variable
> On 17 Nov 2015, at 20:37 , Bert Gunter <bgunter.4...@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.)
--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd....@cbs.dk Priv: pda...@gmail.com
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
