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Re: st: three way tabulation


From   Eric Booth <ebooth@ppri.tamu.edu>
To   "<statalist@hsphsun2.harvard.edu>" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: three way tabulation
Date   Thu, 8 Jul 2010 04:49:31 +0000

<>

Hi Jorge:

You can build a 3-way table a number of ways, but part of the challenge is understanding how you're getting to the summary numbers in 
your table (are the cells counts, sums, averages, etc?).  Assuming that you are counting the number of positive, negative, and zero values in 
var2 and var3 within groups marked by var1--here are 2 methods to build your 3-way table using -outsheet- and -tabout- (from SSC):

********************!
clear
inp var1 var2 var3
1 1 -1
1 -2 2
2 0 3
2 3 3
3 0 4 
3 -2 -2
1 -2 0
3 -1 -1
end

//this section just creates the counts by var1//
forval n = 2/3 {
egen pos`n'a = count(var`n') if var`n'>0, by(var1)
	bys var1: egen pos`n' = max(pos`n'a)
egen neg`n'a = count(var`n') if var`n'<0, by(var1)
	bys var1: egen neg`n' = max(neg`n'a)
egen equiv`n'a = count(var`n') if var`n'==0, by(var1)
	bys var1: egen equiv`n' = max(equiv`n'a)
egen total`n' = rowtotal(pos`n' neg`n' equiv`n')
	recode pos`n' neg`n' equiv`n' total`n' (.=0)
local cells`n' count pos`n'a count neg`n'a count equiv`n'a max total`n' 
	}

//example1:  using outsheet//
	preserve 
drop var2 var3 pos?a neg?a equiv?a 
bys var1: g i=1==_n
drop if i!=1
drop i
outsheet using table.xls, replace
	restore 

//example2:  using tabout//
which tabout
if _rc ssc install tabout
tabout var1 using table.xls, append sum  /// 
c(`cells2' `cells3')  h2( | var2 | || | var3 | | |)  ///
ptotal(none) h3(var1 | Pos | Neg | Equiv | Total | Pos | Neg | Equiv | Total| )
**tabout is more flexible for building/labeling these kinds of tables**	
********************!

~ Eric

__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu
Office: +979.845.6754


On Jul 7, 2010, at 10:41 PM, Mendoza Aldana, Dr Jorge Antonio (WPRO) wrote:

> Dear statalist,
> Using version 10.1 
> Is there a direct way of generating a table like that below (rowvar colvar colvar)? Tab3way doesn't work in this case. 
> I would appreciate very much your advice.
> Thank you,
> Jorge
> 
> 
> 	var2				var3			
> var1	pos	neg	equiv	Total	pos	neg	equiv	Total
> 1	287	141	16	444	73	403	9	485
> 2	14	4	0	18	82	207	5	294
> 3				0	102	110	0	212
> 
> 
> Jorge
> 
> 
> 
> 
> 
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