Evelyne Fournier <efournier@chu-besancon.fr> is having a problem naming
graphs in a loop. Here is an excerpt of Evelyne's data,
loc clage incid morta
Système Nerveux 50-54 23.96 5.99
Système Nerveux 55-59 30.11 10.03
Système Nerveux 60-64 58.73 22.58
And, here is a simplification of the code,
levelsof loc
foreach lev in `r(levels)' {
preserve
keep if loc=="`lev'"
twoway line incid clage, name("`lev'", replace)
restore
}
To which, Stata replies,
Système Nerveux : .twowaygraph_g.new (line incid clage, sort) (line
morta clage, sort), title("Système Nerveux Central"): class type not
found
r(4018);
This is an unfortunate and unhelpful error message that we will improve
in a future update.
The source of the problem, however, is the contents of Evelyne's loc
variable. That variable includes spaces and extended ASCII characters,
neither of which are allowed in Stata names. See [U] 11.3 Naming
conventions.
One possible solution is to simply number the graphs with a leading
stub. For example,
local i 0
levelsof loc
foreach lev in `r(levels)' {
preserve
keep if loc=="`lev'"
twoway line incid clage, name(stub`++i', replace)
restore
}
-- Vince
vwiggins@stata.com
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