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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Mvdecode Problem |
| Date | Fri, 23 Aug 2013 17:24:45 +0200 |
I cannot reproduce that behaviour in Stata 12: *------------------ begin example ------------------ clear set obs 12 gen age = -_n +1 list mvdecode age, mv(0/-9) list *------------------- end example ------------------- * (For more on examples I sent to the Statalist see: * http://www.maartenbuis.nl/example_faq ) -- Maarten On Fri, Aug 23, 2013 at 4:56 PM, James Jensen <jamesjensen212@yahoo.com> wrote: > Thanks nick. > > I am still not sure why when I used mvdecode age, mv(0/-9) the -9 did not become missing and it is only when I used mvdecode age, mv(-9) the -9 then became missing? > > > > > ----- Original Message ----- > From: Nick Cox <njcoxstata@gmail.com> > To: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> > Cc: > Sent: Friday, 23 August 2013, 15:36 > Subject: Re: st: Mvdecode Problem > > It shouldn't make a difference. Both forms are valid numlists. > > . numlist "0/-9" > > . ret li > > macros: > r(numlist) : "0 -1 -2 -3 -4 -5 -6 -7 -8 -9" > > . numlist "-9/0" > > . ret li > > macros: > r(numlist) : "-9 -8 -7 -6 -5 -4 -3 -2 -1 0" > > Notice that whenever you have issued the first command, the second > command is redundant and won't undo recoding of zeros to missing. > > Nick > njcoxstata@gmail.com > > > On 23 August 2013 15:27, James Jensen <jamesjensen212@yahoo.com> wrote: >> Hi all, >> >> I want to code whatever negative or zero in the dataset to missing. >> >> If I use mvdecode _all, mv(0/-9) or mvdecode _all, mv(-9/0) >> >> Then I notice when I used mvdecode _all, mv(0/-9) , the -9 did not become missing. >> >> The second thing is that I want to recode whatever negative to missing. >> >> If I use mvdecode _all, mv(-1/-9) or mvdecode _all, mv(-9/-1) >> >> Would it make a difference whichever way I put the -1 or -9 first? >> >> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ -- --------------------------------- Maarten L. Buis WZB Reichpietschufer 50 10785 Berlin Germany http://www.maartenbuis.nl --------------------------------- * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/