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Re: st: RE: question about macro


From   Shige Song <ssong@nicco.sscnet.ucla.edu>
To   Nick Cox <n.j.cox@durham.ac.uk>
Subject   Re: st: RE: question about macro
Date   Tue, 9 Mar 2004 14:15:02 -0800 (PST)

Dear Nick,

That works, thanks!

Best,
Shige

On Tue, 9 Mar 2004, Nick Cox wrote:

> This is a pitfall frequently mentioned on this list,
> e.g. on 11 Dec 2003.
>
> Your statement
>
> local ind = r(levels)
>
> obliges Stata to evaluate the expression to the right of
> the = sign, and there is a limit on the length of expression
> that can be handled, which causes truncation in this case.
>
> You should get where you want to be in one step by
>
> . levels groups, local(ind)
>
> Otherwise, don't evaluate where you don't need to, just copy!
>
> . local ind "`r(levels)'"
>
> avoids the evaluation.
>
> Nick
> n.j.cox@durham.ac.uk
>
> > -----Original Message-----
> > From: owner-statalist@hsphsun2.harvard.edu
> > [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Shige Song
> > Sent: 09 March 2004 11:22
> > To: statalist@hsphsun2.harvard.edu
> > Subject: st: question about macro
> >
> >
> > Dear All,
> >
> > I am haveing troubles with the length of macro, here is what I did
> >
> > . levels(groups)
> > 1111 1112 1113 1114 1115 1116 1121 1122 1123 1124 1125 1126
> > 1131 1132 1133
> > 1134 1135 1136 1141 1142 1143 1
> > > 144 1145 1146 1211 1212 1213 1214 1215 1216 1221 1222 1223 1224 1225
> > 1226 1231 1232 1233 1234 1235 1236
> > > 1241 1242 1243 1244 1245 1246 1311 1312 1313 1314 1315 1316
> > 1321 1322
> > 1323 1324 1325 1326 1331 1332 1333
> > >  1334 1335 1336 1341 1342 1343 1344 1345 1346 2111 2112
> > 2113 2114 2115
> > 2116 2121 2122 2123 2124 2125 212
> > > 6 2131 2132 2133 2134 2135 2136 2141 2142 2143 2144 2145
> > 2146 2211 2212
> > 2213 2214 2215 2216 2221 2222 22
> > > 23 2224 2225 2226 2231 2232 2233 2234 2235 2236 2241 2242
> > 2243 2244 2245
> > 2246 2311 2312 2313 2314 2315 2
> > > 316 2321 2322 2323 2324 2325 2326 2331 2332 2333 2334 2335 2336 2341
> > 2342 2343 2344 2345 2346
> > . local ind=r(levels)
> > . display "`ind'"
> > 1111 1112 1113 1114 1115 1116 1121 1122 1123 1124 1125 1126
> > 1131 1132 1133
> > 1134 1135 1136 1141 1142 1143 1
> > > 144 1145 1146 1211 1212 1213 1214 1215 1216 1221 1222 1223 1224 1225
> > 1226 1231 1232 1233 1234 1235 1236
> > > 1241 1242 1243 1244 1245 1246 131
> >
> > As you can see, after extracting the contents of variable
> > "groups" and put
> > the categories into a local macro "ind", more than half of
> > the content was
> > truancated. Any idea about why, and more importantly, is
> > there a way to
> > work around this?
> >
> > I am running Stata 8.2 SE, by the way.
>
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