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Re: Re: st: catplot problem

From   Maarten buis <>
Subject   Re: Re: st: catplot problem
Date   Wed, 7 May 2008 15:10:23 +0100 (BST)

--- Tunga Kantarci <> wrote:
> The problem: Now, I have variable 3, just like variable 1, which
> takes 10 values but for values 2 and 3 there are no observations.
> When I run catplot, 2 has three categories and 3 has three
> categories, etc up to 8. There are no bars for 9 and 10.
> This is the problem: the frequency that should stand for value '4'
> stands for '2' in the graph. The frequency that should stand for
> value '5' stands for '3' in the graph.  Now, if we agree on this -I
> mean if I was able to make my problem clear - this is a deficiency 
> of catplot for me: Catplot simply places the bars to the wrong
> Put differently: if catplot was able to eliminate values 2 and 3 in
> the graph (because there are no observations for them) I would have
> problem. But instead, catplot displays values 2 and 3 on the
> horizontal axis, but the associated bars beling to values 4 and 5.
> Now, I call this deficieny, bug, etc. I don't know what you want to
> call it.

I am not able to reproduce the "bug" you are reporting. Type the
following commands in Stata:

sysuse auto
catplot bar foreign rep78

If I read your example correctly you think that the bar for foreign of
rep78 values 3 4 and 5 would all be incorrectly shifted two places to
the left because there are no foreign cars for values 1 and 2. This is
not the case whith my version of -catplot-.

-- Maarten

Ps. In general I would avoid using the words bug or deficiency, and
instead say that you where expecting command -xyz- to produce 123, but
instead it gave you 456, followed with a question of why this is
happening. Even better would be to give an example using one the
datasets available in Stata (see: -help sysuse-), that way everyone can
immediately see what you are doing and what the results of your
commands are. 

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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