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From |
tashi lama <ltashi32@hotmail.com> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: work with larger string length |

Date |
Tue, 27 Mar 2012 14:57:51 +0000 |

Hellow All, I posted a question related to this earlier and received favorable answers although I am not sure if I completely understand the science. I have dared to post this question again. Any help will be highly appreciated. I have a dataset of some 48 variables and the nature of my problem obliges me to have all variables start with hit. when I ran this code, foreach x of varlist hit* { local varlist_new=subinstr("`varlist'", "`x'","",1) di "`varlist_new'" egen tot_`x'=rowtotal(`varlist_new') } The problem was I did get answers but the upon close analysis, the answers were incorrect. I am assuming it must be because the length of my string variables exceed 244. Now, I was advised to use extended subinstr function, which seem to work. Further I wrote a code below, which also works. foreach x of varlist hits* { gen temp=`x' replace `x'=. egen tot_`x'=rowtotal(hits*) replace `x'=temp drop temp } My question is 1. since string limit is 244, what is it about extended function subinstr that makes string limitation non issue. Does extended function increase the acceptable string length which I think is unlikely? 2. The code without subinstr works and again, it sounds like string limitation is a non issue. Again, is the code increasing the accepateble length of the string?? 3. when I use length command to find the length of the string in stata12, I get unrecognized command. Any idea. Thanks so much... Tashi * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: RE: work with larger string length***From:*Nick Cox <n.j.cox@durham.ac.uk>

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