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st: RE: warning for -tabdisplay-

From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: RE: warning for -tabdisplay-
Date   Thu, 28 Jul 2005 18:38:30 +0100

Although -disp- is an acceptable abbreviation 
for -display-, -tabdisp- is the only name in 
question here. 

I am agnostic on this point, even though I have
on occasion been bitten by this. While you're 
waiting for StataCorp to think about and possibly 
do this, the check is not too difficult: 

foreach v of var v1 v2 v3 { 
	bysort cess (`v') : assert `v'[1] == `v'[_N] 

[email protected] 

> I often like to use  the -tabdisplay- command, but when I do, I
> sometimes have this lurking fear that the variables in the 
> "cell" are not
> really constant, in which case using -tabdisplay- may give erroneous
> information. Of course I can check for constant variables by 
> issuing other
> commands first, but this is a waste of time if they really 
> are constant. So
> I would like to propose that -tabdiplay- be modified to give a warning
> message if a variable in the "cell" is not constant. e.g.
> . tabdisp sess,cell(v1 v2 v3)
> ***  warning - v2 is not constant *****

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