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st: AW: help with pctile


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: help with pctile
Date   Thu, 19 Feb 2009 15:01:02 +0100

<> 


Nothing wrong, I would say: You asked for 100 values, in this case
percentiles, and told Stata to store them alongside the rest of your data.
What else could Stata do but comply and open a new column in your dataset?
For this column, there are only 100 values to fill the first 100
observations. As Stata hates to leave cells empty - in contrast to popular
spreadsheet software- it fills the rest with missings. 
BTW, if you want the same results stored in returned results, look at
-_pctile-...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Janneke Pieters
Gesendet: Donnerstag, 19. Februar 2009 14:52
An: statalist@hsphsun2.harvard.edu
Betreff: st: help with pctile

Dear users,

I want to generate 100 percentiles for a variable called cmpce. These
will be used later to calculate the mean of cmpce for each percentile.
In Stata10 I type:

pctile percentile = cmpce [pweight = weight], nquantiles(100) genp(pctile)

The new variables percentile and pctile only have a value for the first
100 observations in my data, and a missing value for the other 102257
observations. Is something wrong with my command?

Thanks in advance,
Janneke Pieters

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