Cathy L. Antonakos
> I am printing graphs for temperature data collected at multiple time
> points. One graph for each person in a data file. It's a two way
graph.
> I managed to create one graph per person using
> for num=1001/1011: graph temp order if id==X ... etc.
> However, if the subject id is completely missing from the file,
> the graph still prints (empty) for that person.
> I tried to include "if order~=." after the "graph" command
> (e.g., to skip cases with missing data on one or
> the other variable). It didn't work.
> Is the problem that the case simply doesn't exist in the file,
> so there is no data to operate on to figure out whether a
> variable is missing or not?
> If I embed a blank record within the file for any subject who
> is missing data and who falls within the series from 1001 to 1011,
> will that enable me to override with an "if order~=." statement
> in the "graph" command?
> How would I do this?
> Suggestions welcome. I am a fairly new Stata user, so the simpler
> the suggestion, the better. Thanks.
All Statalist members are asked to state the
version of Stata they are using. Please see
http://www.stata.com/support/statalist/faq/#advice
I guess Stata 7 in your case.
The FAQ at http://www.stata.com/support/faqs/data/for.html
applies. Perhaps the easiest solution for you is
egen group = group(id)
su group, meanonly
forval i = 1/`r(max)' {
su id if group == `i', meanonly
graph temp order if group == `i', t1(id is `r(max)')
}
This may look worse than you want -- it is worse
than you want -- but some extras have been written
in.
The -egen- statement creates a variable -group- guaranteed to
have consecutive integers from 1 up as
values. You still need to know the highest
value of -group-, which -summarize- leaves
behind in `r(max)'. In producing
a bundle of these graphs, things can get
very confusing unless each is labelled,
so as an extra step, the -id- for each graph
is shown explicitly.
-for- is a deadend and goes undocumented
in Stata 8, so starting now on -forvalues-
and -foreach- will pay enormous dividends
in your Stata career.
In Stata 8, there is a cleaner solution:
levels id, local(levels)
foreach l of local levels {
line temp order if id == `l', subtitle(id is `l')
}
once -levels- has been installed from SSC.
You do not need to mess with your data,
at any rate.
Nick
[email protected]
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