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


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: AW: why is this graph all over the place?
Date   Tue, 22 Sep 2009 11:02:48 +0100

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 -levelsof-, it is an out-of-date command, apparently with limited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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