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st: RE: 'twoway' syntax subtlety


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: 'twoway' syntax subtlety
Date   Wed, 15 Oct 2008 14:19:30 +0200

The -twoway- family can sometimes behave quite differently from the rest of
the graphs in Stata. IF you want to know what is going on "under the hood",

************
sysuse auto, clear

profiler on

kdensity mpg
tw (kdensity mpg)

profiler off
profiler report
************

This method results in less clutter (than the -trace-) on the screen and
still gives you the essential information.

HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of George Hoffman
Sent: Wednesday, October 15, 2008 1:52 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: 'twoway' syntax subtlety

I'm trying to overlay two (or more) kdensity plots.

kdensity accepts the 'norm' option
twoway kdensity does not - see log below

I thought twoway calls kdensity - but I must have a misunderstanding of
stata 10 graphics....

An explanation of principle would be most appreciated.
Thank you,
George Hoffman



This my Stata 10 log:

. two (kdensity rso2c if vmi85==0) (kdensity rso2c if vmi85==1)

. two (kdensity rso2c if vmi85==0,norm) (kdensity rso2c if vmi85==1,norm)
option norm not allowed
r(198);

. kdensity rso2c if vmi85==0,norm

. two kdensity rso2c if vmi85==0,norm
option norm not allowed
r(198);


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