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st: calculating statistics for multiple variables


From   Jon Schwabish <jschwabi@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: calculating statistics for multiple variables
Date   Thu, 21 Aug 2008 12:18:34 -0700 (PDT)

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).

Thanks,
jon

std




      

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