[R] Importing data using Foreign

[Elham Daadmehr]

Thanks a lot. I’ve got it just now.

On Wed, Aug 26, 2020 at 6:03 PM peter dalgaard <pdalgd using gmail.com> wrote:

> It is because you don't know whether you want it or not.
>
> It is a bit more obvious with integer indexing, as in color[race]: if race
> is NA you don't know what color to put in, but the result should be the
> same length as race.
>
> With logical indices, the behaviour is a bit annoying, but ultimately
> follows from the coercion rules: You might think that you could treat NA as
> FALSE (& the subset() function does just that), but then you'd get the
> problem that x[NA] would differ from x[as.integer(NA)] because NA is of
> mode "logical", lowest in the coercion hierarchy.
>
> -pd
>
> > On 26 Aug 2020, at 17:06 , Elham Daadmehr <e.daadmehr using gmail.com> wrote:
> >
> > Thanks guys. but I'm a bit confused. the input is the first column
> (z[,1] and z1[,1]).
> > How is it possible that a subset of a non-NA vector, contains NA?
> >
> > On Wed, Aug 26, 2020 at 4:58 PM Eric Berger <ericjberger using gmail.com>
> wrote:
> > Good point! :-)
> >
> >
> > On Wed, Aug 26, 2020 at 5:55 PM peter dalgaard <pdalgd using gmail.com> wrote:
> > Offhand, I suspect that the NAs are in the 8th column.
> >
> > > On 26 Aug 2020, at 10:57 , Elham Daadmehr <e.daadmehr using gmail.com>
> wrote:
> > >
> > > Hi all,
> > >
> > > I have a simple problem. I get stuck in using the imported spss data
> (.sav)
> > > using "read.spss".
> > > I imported data (z) without any problem. After importing, the first
> column
> > > doesn't contain any "NA". but when I choose a subset of it (like:
> > > z[z[,8]=="11"|z[,8]=="12"|z[,8]=="14",]), lots of NA appears (even in
> the
> > > first column).
> > >
> > > The (.sav) file is the output of Compustat (WRDS).
> > >
> > > It is terrible, I can't find the mistake.
> > >
> > > Thank you in advance for your help,
> > > Elham
> > >
> > >       [[alternative HTML version deleted]]
> > >
> > > ______________________________________________
> > > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> > > PLEASE do read the posting guide
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> > > and provide commented, minimal, self-contained, reproducible code.
> >
> > --
> > Peter Dalgaard, Professor,
> > Center for Statistics, Copenhagen Business School
> > Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> > Phone: (+45)38153501
> > Office: A 4.23
> > Email: pd.mes using cbs.dk  Priv: PDalgd using gmail.com
> >
> > ______________________________________________
> > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd.mes using cbs.dk  Priv: PDalgd using gmail.com
>
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