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st: RE: lnskew0


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: lnskew0
Date   Wed, 19 Apr 2006 22:55:55 +0100

On further analysis: 

This is repeatable with precisely the same 
data. -lnskew0- goes round in a loop and makes
a big number bigger and bigger until it 
becomes missing. 

In particular, 

5.7526180296e+307*2

gets mapped to 

.z_

Stata tries its level best to interpret that as 
a variable name, but that exchanges one error
for another. 

In short: you triggered a bug. 

As others have said, you can't get a normal 
out of data like this anyway. Four spikes 
will get mapped to four different spikes, 
but four spikes do not a bell make. 

Nick 
n.j.cox@durham.ac.uk 

Vivien W. Chen
 
> 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!
 
> 
> .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);
> 

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