[Limdep Nlogit List] manually recognizing missing data

[Philip A. Viton]

Bill: many thanks; but: are you sure? I deleted the old xrej, then 
copied your suggestion (changing the name of myvar, obviously) and 
ran it. Result: xrej, when viewed in the data editor, still has a 
blank (standing for -999, right?) in the position where the variable 
has something missing. I thought it might be sensitive to the skip 
setting, so I deleted xrej, did noskip$ and tried again, with the 
same result.  Am I forgetting something?





At 12:33 PM 7/31/2007, you wrote:
>Phil.  For some purposes (like this one), you can treat the -999 as 
>if it were a
>real value.  Thus,
>CREATE ; If ( myvar < -998 )  XREJ = 1 $
>/Bill
>
>************************************************
>Professor William Greene
>Department of Economics
>Stern School of Business
>New York University
>44 West 4th St., Rm. 7-78
>New York, NY   10012
>Fax. 212.995.4218
>URL. http://www.stern.nyu.edu/~wgreene
>Email. wgreene at stern.nyu.edu
>************************************************
>
>----- Original Message -----
>From: "Philip A. Viton" <viton.1 at osu.edu>
>Date: Tuesday, July 31, 2007 10:21 am
>Subject: [Limdep Nlogit List] manually recognizing missing data
>
> >
> > Is there some create command which will allow you to create a
> > variable which has (say) a 1 where another variable has missing
> > data
> > and zero otherwise? I've tried
> >
> > create;if (myvar=-999) xrej=1$
> >
> > but this seems to put a missing data code in positions where myvar
> > has missing data!
> >
> > Thanks!
> >
> >
> >
> >
> > ------------------------
> > Philip A. Viton
> > City Planning, Ohio State University
> > 275 West Woodruff Avenue, Columbus OH 43210
> > viton.1 at osu.edu
> >
> > _______________________________________________
> > Limdep site list
> > Limdep at limdep.itls.usyd.edu.au
> > http://limdep.itls.usyd.edu.au
> >
>
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------------------------
Philip A. Viton
City Planning, Ohio State University
275 West Woodruff Avenue, Columbus OH 43210
viton.1 at osu.edu