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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
RE: st: collapse prob |

Date |
Wed, 21 May 2008 12:17:44 +0100 |

I agree with Svend, but Martin's is a understandable wish. This is a trickier problem that might first appear. For example, variable names might be too long to allow a simple prefix or suffix. Whatever way of shortening the name is used, there is still a need to maintain distinct names. This kind of problem arises with other commands, such as -xi-, but producing good defaults could easily add a lot of code to -collapse-. Rightly or wrongly, Stata makes this your problem. Nick n.j.cox@durham.ac.uk Martin Weiss True, but I would want Stata to take care of the naming automatically. E.g., prepend or append the name of the stat being calculated so that "(mean) gpa" becomes "mean_gpa" in the output... Svend Juul Martin Weiss wrote: In this example, does your Stata complain about a "name conflict" as well? ************** webuse college, clear collapse (mean) gpa (median) gpa [fw=number], by(year) ************** In effect, you cannot calculate two statistics for the same variable without renaming one of the results. This is mentioned in [D] collapse at the bottom of page 48, but rather cursorily. And correct me if I am wrong, but there is just no way you could have these statistics renamed in the dialog box. You must first find out that you have the problem I am describing, and second edit the command line to ********** webuse college, clear collapse (mean) meangpa=gpa (median) mediangpa=gpa [fw=number], by(year) ********** to make this work. It took me quite some time to find that out... ================================================================ In the dialog box you can type in the variable field: meangpa=gpa Logically, I think it is obvious that two different pieces of information must have different names. * * 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/

**References**:**Re: st: collapse prob***From:*Svend Juul <SJ@SOCI.AU.DK>

**RE: st: collapse prob***From:*"Martin Weiss" <martin.weiss@uni-tuebingen.de>

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