[Limdep Nlogit List] manually recognizing missing data

[Philip A. Viton]

Thanks - this worked, but only after I exited and restarted limdep.

Before I did this, I also ran noskip$ on the theory that this might 
explain why create;xrej=0$  still got made with missing data; but 
that didn't help. Since in my earlier session I'd been doing some 
estimation work, presumably I'd done something which prevented it all 
from working - any idea what that might have been?




At 01:03 PM 7/31/2007, you wrote:
>Phil.  Try creating XREG = 0 first, so it exists with no missing values, then
>execute the command I sent you.
>/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
>Ph. 212.998.0876
>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 10:49 am
>Subject: Re: [Limdep Nlogit List] manually recognizing missing data
>
> >
> > 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
> > > >
> > >
> > >_______________________________________________
> > >Limdep site list
> > >Limdep at limdep.itls.usyd.edu.au
> > >http://limdep.itls.usyd.edu.au
> >
> >
> > ------------------------
> > 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