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From |
Maarten Buis <maartenlbuis@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: A loop for each couple of variables (instead of for each variable) |

Date |
Mon, 12 Sep 2011 13:09:48 +0200 |

On Mon, Sep 12, 2011 at 12:53 PM, Fabien Bertho wrote: > I created a loop in order to estimate various specifications of my model <snip> > Now, I would like to run this loop not for two variables but for two locals that comprises two variables. I tried the following code. <snip> > But it does not work because during the loop Stata splits my local into two variables… You can nest a macro into a macro name, so if your loop creates a macro `i' that contains 1 in the first iteration, 2 in the second iteration, etc. than you can refer to a local `var`i'', which will be read as `var1' in the first iteration, `var2' in the second iteration, etc. *-------------- begin example ------------- sysuse auto, clear local var1 "length weight" local var2 "gear_ratio turn" forvalues i = 1/2 { reg mpg `var`i'' } *------------ end example ----------------- (For more on examples I sent to the Statalist see: http://www.maartenbuis.nl/example_faq ) Another solution is to store these varlists in one local and surround each sub-varlist with quotes. The entire string than needs to be surrounded with compound quotes, see -help quotes-. *-------------- begin example ------------- sysuse auto, clear #delim ; local vars `" "length weight" "gear_ratio turn" "' ; #delim cr foreach var of local vars { reg mpg `var' } *------------ end example ----------------- (For more on examples I sent to the Statalist see: http://www.maartenbuis.nl/example_faq ) Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/

**References**:**st: A loop for each couple of variables (instead of for each variable)***From:*Fabien Bertho <fabien.bertho@sciences-po.org>

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