Re: st: lnskew0

[Ron�n Conroy <rconroy@rcsi.ie>]

On 19 Aib 2006, at 17:57, Vivien W. Chen wrote:

> I've got a question about using lnskew0 to create a variable that  
> transform
> skewness as zero. For some unknown reason, I can successfuly create  
> for some
> variables, but some failed. I list the error message as below.  
> Please help if
> you know the answer. Thanks!
>
> Vivien
>
>
>
> .tab mmwkdep
>
>  how well
> youcould
> manage
> working
> depression  |      Freq.     Percent        Cum.
> ------------+-----------------------------------
> 	  0	  14,474       70.00	  70.00
>           1 |      4,429       21.42      91.42
>           2 |      1,293       6.25       97.67
>           3 |        481       2.33       100.00
> ------------+-----------------------------------
>       Total |        296      100.00
>
>
> .lnskew0 mmwkdepLG=mmwkdep
> variable z_ not found
> r(111);

Reproducible on Stata/SE 9.2 on OS X. The command works fine on the  
mpg variable from the auto dataset, so this may be a problem with  
your very short scale.

Note that trying to eliminate the skew from a variable whose four  
values seem to represent ordered categories doesn't seem to have an  
immediate clear justification. What are you trying to accomplish?

=========
Ron�n Conroy
rconroy@rcsi.ie
+353 (0) 1 402 2431
+353 (0) 87 799 97 95
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