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st: RE: calculating statistics for multiple variables


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: calculating statistics for multiple variables
Date   Fri, 22 Aug 2008 16:51:01 +0100

Much depends on the etc. but you can get many statistics as summaries of
matrices via Mata very easily, and many more with some programming. 

That said, if you are doing this even once, a -reshape- really is a good
idea. 

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

Jon Schwabish

Does anyone know of a quick way of calculating sample statistics for
multiple variables without reshaping the data? For example, if I have
three variables (columns), how do I calculate means, standard
deviations, etc without reshaping the data into one variable (or,
obviously, doing the calculations by hand)?

For example, calculate the standard deviation of v1 and v2, by treating
them as one variable. Thus, treat 
v1 v2 
1  2  
2  4  
3  6  
4  8  

as 

v1
1
2
3
4
2
4
6
8

(instead of calculating it by its parts).


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