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Re: st: AW: why is this graph all over the place?


From   Nirina F <fstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: why is this graph all over the place?
Date   Tue, 22 Sep 2009 10:15:32 -0400

Dear Martin,
Using levelsof does make a difference. But I don't understand why the
loop doesn' work and therefore doesn't record the new marginal effects
calculated into marg when I put my own equation.
And I really don't change anything else than the variables.
Thanks,
nirina

On Tue, Sep 22, 2009 at 6:02 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> Good point. I had forgotten that part of the history. Some if not all versions of -levels- did not support non-integer values.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Martin Weiss
>
> "-levels- and -levelsof- had, and have, the same functionality, so any
> other guesses are off target."
>
>
> Why does -levels- make Stata choke, then, in this example, where -levelsof-
> does not?
>
>
>
> *************
> clear*
>
> input x
> 1
> 2
> 3
> 4.5
> end
>
> compress
> list, noobs
>
> levelsof x
> levels x
> *************
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Nick Cox
> Gesendet: Dienstag, 22. September 2009 11:33
> An: statalist@hsphsun2.harvard.edu
> Betreff: RE: st: AW: why is this graph all over the place?
>
> -levelsof- was -levels- was -vallist-.
>
> That is, a user-written command called -vallist- was rewritten as
> -levels- which was then adopted by StataCorp within the life-time of
> Stata 8. In Stata 9 the name was changed to -levelsof- because the name
> "levels" seemed too good to use on that command.
>
> My guess is that it was imagined that the name might reappear for a
> different purpose as part of the factor variables project.
>
> -levels- and -levelsof- had, and have, the same functionality, so any
> other guesses are off target.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Nirina F
>
> Replacing it with -levelsof- made it work!
>
> Martin Weiss
>
>> See, just when I thought I knew Stata: -levels- is not the
> abbreviation for
>> -levelsof-, it is an out-of-date command, apparently with limited
>> functionality.
>
>
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