[R] Importing data using Foreign

[peter dalgaard]

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
> 
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> 
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-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
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