Thursday, March 16, 2006
Re: st: looping over parallel lists - is there a alternative to "for"?
I suppose you can have three globals and then have one loop to loop through them? Some samples can be found in C Baum's "A little bit of Stata programming goes a long way ..."
I quite like the -for- command as well, sometimes I only want to loop one line of command and using commands like -forvalue- and -foreach- gets a bit complicated. And speaking for myself, using -for- would save me from making typos like using ) instead of }.
On 3/16/06, Gawrich Stefan <email@example.com> wrote: > Hi, > > I do a lot of routine or repetitive data analysis and use loops and lists > frequently (btw, thx to Nick Cox, his "How to fact lists with fortitude" > helped me a lot). > > I'm wondering why the "for"-command is officialy out of date in Stata while > one of it's best features - the use of parallel lists - can't be done > otherwise. Or am I missing something? > > One example: I routinely map ten different diseases with tmap and save the > maps as a graphic file. > > for var var1-var10 \ any "Disease1" "Disease2" [...] \ any "Filename1" > "Filename2" [...] : /// > tmap choro X, id(county) map("county-Coordinates.dta") title("Y") \ graph > export "Z.png", replace > > In this example each graph is determined by something like a 3-tuple of > variable, title and saving-filename. > This is just basic code, in real life the code blows up and becomes hard to > read, as we all know, "for" has some disadvantages. > So if it can be done in a more structured manner, I would like to know... > > Best wishes > > Dr. Stefan Gawrich > Hesse State Health Office > Wolframstr. 33 > 35683 Dillenburg > > > > > > > > > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ >
-- Ada Ma Research Fellow Health Economics Research Unit University of Aberdeen, UK. http://www.abdn.ac.uk/heru/ Tel: +44 (0) 1224 553863 Fax: +44 (0) 1224 550926
* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
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