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Re: st: meansdplot with if statement


From   Cathy Antonakos <cathya@umich.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: meansdplot with if statement
Date   Thu, 27 Sep 2012 19:06:27 -0400

Many thanks, Nick. This is very helpful, in many ways.
Cathy

On Thu, Sep 27, 2012 at 6:54 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> -meansdplot- is a program from Phil Ender from UCLA:
>
> meansdplot from http://www.ats.ucla.edu/stat/stata/ado/analysis
>     meansdplot.  Plot mean and stendard deviation for multiple groups. /
>     Philip B. Ender / Statistical Computing and Consulting / UCLA Academic
>     Technology Services / ender@ucla.edu / Stata ado and hlp files in the
>     package / distribution-date: 20071117
>
> Please remember that you are asked to explain _where_ user-written
> programs you refer to come from.
>
> You have, I think, found a bug in -meansdplot-. The program accepts an
> -if- qualifier [not a statement] but it only affects part of the plot
> and does not affect the main calculations.
>
> One work-around for what you want while Phil fixes the code is
>
> forval j = 1/3 {
>            preserve
>            keep if group == `j'
>            meansdplot var1 var2
>            restore
> }
>
> -sttripplot- (SSC) and -dotplot- are other commands with broadly
> similar aims. It is also always possible to -collapse- a dataset
> -by()- some group variable and plot summary statistics directly.
>
>
> On Thu, Sep 27, 2012 at 9:13 PM, Cathy Antonakos <cathya@umich.edu> wrote:
>> Does the -meansdplot- command recognize an if statement? I issued the
>> following commands and obtained the same graph for all 3 groups. Maybe
>> there is an alternative way to do this, but the help suggests that if
>> is operational. Thanks in advance!
>>
>> . meansdplot var1 var2 if group == 1
>> . meansdplot var1 var2 if group == 2
>> . meansdplot var1 var2 if group == 3
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