Christopher F Baum
>
> This will certainly work, but will cause a number of graphs
> to just display
> on the screen. Perhaps adding saving( ) would be useful.
> However that
> brings up a limitation of by (which is a wonderful feature,
> but sometimes
> does not do all that one needs...) It also does not allow
> labelling of the
> graphs. A modified
> approach using Nick Cox' 'levels' (ssc desc levels):
>
> use auto
> g str1 mm = substr(make,1,1) * equiv of census tract
> levels mm,macname(cars)
[NJC: syntax is -levels mm, local(cars)- ]
> foreach c of local cars {
> graph price mpg if mm=="`c'", saving(cars_`c',replace)
> ti("Cars of make
> `c'")
> }
>
> This will create files cars_A.gph, cars_B.gph, etc., with
> the graph titles
> containing information on the category being graphed.
>
> In fact one can then do asomething like
>
> graph using cars_A cars_B cars_C cars_D
>
One extra trick sometimes useful here:
add -more- so that you get a slide show, not
a movie.
foreach c of local cars {
graph price mpg if mm=="`c'", saving(cars_`c',replace)
ti("Cars of make > `c'")
more
}
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