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st: RE: RE: bihistogram


From   "Rajesh Tharyan" <R.Tharyan@exeter.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: bihistogram
Date   Tue, 26 Aug 2008 13:54:27 +0100

Thank you very much nick,

I will check that out.. 

rajesh

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: 26 August 2008 12:50
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: bihistogram

A bihistogram -- I didn't know before searching -- is a dual histogram
with one group's frequencies shown as negative. 

Rajesh found nothing, but -search histogram- points to this: 

SJ-5-2  gr0014  . . . . . . . Stata tip 20: Generating histogram bin
variables
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. A.
Harrison
        Q2/05   SJ 5(2):280--281                                 (no
commands)
        tip illustrating the use of twoway__histogram_gen for
        creation of complex histograms and other graphs or tables

The text is accessible to all via 
<http://www.stata-journal.com/sjpdf.html?articlenum=gr0014>

That includes a worked example. 

Here is another: 

sysuse auto, clear 
twoway__histogram_gen mpg if foreign, width(2) start(10) freq ///
gen(freq_foreign mpg_foreign)
twoway__histogram_gen mpg if !foreign, width(2) start(10) freq /// 
gen(freq_domestic mpg_domestic)
replace freq_foreign = -freq_foreign
twoway bar freq_foreign mpg_foreign, barw(2) || ///
bar freq_domestic mpg_domestic, barw(2) ///
legend(order(1 "Foreign" 2 "Domestic")) 

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

Rajesh Tharyan

Is it possible to produce a bihistogram in stata? Nothing turns up on
findit
or search. I was trying to write a program to do that. But can one get
stata
to produce histogram with -ve frequencies? 


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