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From |
James Sams <sams.james@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How do I create a loop that calculates new variables by performing the simple mathematical function of subtracting one varlist on another varlist? |

Date |
Mon, 09 Jan 2012 00:39:36 -0600 |

On Monday 09, January 2012 02:47:44 you wrote: > I am trying to subtract one sequential list of variables (e.g., a1 to a73) > from another sequential list (e.g., b1 to b73) using a loop statement such > as the "foreach..." I am trying to avoid repeating the same, simple > function (in this case 73 times). > > Specifically, I want a loop that repeats this: > > gen h7a001=h7r001-h7t001 > gen h7a002=h7r001-h7t002 > to > gen h7a073=h7r003-h7t073 > > Simple question but I am trying to learn Stata so that I can use the power > of its programming capabilities. This particular challenge eludes me. My preferred solution is to use display as an extended function . local i 1 . display "`i'" 1 . local j : display %03.0f `i' . display "`j'" 001 so at the top of your loop, reassign your loop variable, or perhaps make a new variable This is more general than the previously posted solution. -- James Sams sams.james@gmail.com * * 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: How do I create a loop that calculates new variables by performing the simple mathematical function of subtracting one varlist on another varlist?***From:*"Saporito, Salvatore J" <sjsapo@wm.edu>

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