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From |
Nick Winter <nw53@cornell.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: RE: Using variables in numlist of forvalue command |

Date |
Wed, 08 Jun 2005 13:05:51 -0400 |

At least the advice was convergent, if not *precisely* identical. --Nick W It 12:56 PM 6/8/2005, you wrote:

Oh shucks, I see that Nick Winter has already sent the same advice. Nick n.j.cox@durham.ac.uk Nick Cox > You can't put a variable into a numlist > in this way. > > Try something like > > su daysupply, meanonly > forvalues daynum = 2/`r(max)' { > replace date`daynum' = date1 + `daynum' - 1 if `daynum' > <= daysupply > } > > You may know the maximum in advance, so that you > can simplify to say > > forvalues daynum = 2/10 { > replace date`daynum' = date1 + `daynum' - 1 if `daynum' > <= daysupply > } > > Nick > n.j.cox@durham.ac.uk > > Shawn.Fultz@med.va.gov > > I'm trying to change several variables in each observation. > The problem is that the number of variables I want to update > is different for each observation and this number is a > variable in that observation. I've tried using a forvalues > loop, which works if I specify a stop and start number, but I > cannot find a way to put a variable in the numlist allowing > this to change for each observation. > > Here's the command that works: > forvalues daynum = 2/10 { > replace date`daynum'=date1+`daynum'-1 > } > > But when I replace the 10 with the variable that tells me how > many date variables to change, I get a syntax error. > forvalues daynum = 2/daysupply { > replace date`daynum'=date1+`daynum'-1 > } * * 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/

-------------------------------------------------------- Nicholas Winter 607.255.8819 t Assistant Professor 607.255.4530 f Department of Government nw53@cornell.edu e 308 White Hall falcon.arts.cornell.edu/nw53 w Cornell University Ithaca, NY 14853-4601 * * 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/

**Follow-Ups**:**Re: st: RE: RE: Using variables in numlist of forvalue command***From:*"shawnfultz" <shawn.fultz@med.va.gov>

**References**:**st: RE: RE: Using variables in numlist of forvalue command***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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