[Rd] read.table reads "i" as NA_complex_

[William Dunlap]

Thank you both!

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Wed, Oct 7, 2015 at 1:44 PM, peter dalgaard <pdalgd at gmail.com> wrote:

> This is fixed/changed in r-devel:
>
> > str(type.convert("i"))
>  Factor w/ 1 level "i": 1
>
> It was reported on July 18 as PR#16473, if you care.
>
> (Funny how an obscure issue goes unnoticed for a decade, then pops up
> twice independently within a few months. A property of the Poisson process,
> I suppose.)
>
>
> > On 07 Oct 2015, at 22:22 , William Dunlap <wdunlap at tibco.com> wrote:
> >
> > I just noticed that read.table() and type.convert() interpret the string
> "i"
> > as a missing value of type complex.
> >> str(read.table(text=c("i\ni\ni\ni\n")))
> >   'data.frame':   4 obs. of  1 variable:
> >    $ V1: cplx  NA NA NA ...
> >> str(type.convert("i"))
> >    cplx NA
> >
> > If there are other strings in the column it makes the column character so
> > most people will not notice
> >> str(read.table(text=c("i\nii\niii\niv\n")))
> >   'data.frame':   4 obs. of  1 variable:
> >    $ V1: Factor w/ 4 levels "i","ii","iii",..: 1 2 3 4
> >
> > Is this intended?  It surprised me.
> >
> > Bill Dunlap
> > TIBCO Software
> > wdunlap tibco.com
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com
>
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