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From |
JLGreig <jlgreig@yahoo.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: geometric mean saved results |

Date |
Wed, 18 Sep 2002 11:14:29 -0700 (PDT) |

I apologize--let me provide a few more details. The previous was actually part of a larger little program which essentially used a portion of a large database (gender==1), displayed a description of the ranksum to be performed, quietly tabulated the arithmetic, geometric, and harmonic means of a continuous variable then attempted to ranksum test for differences in the geometric means of that continuous variable across categories of categorical variables noted as `1' (var1 var2), as in the below, full program. There is only one observation of the continuous variable per id. capture program drop taball program define taball while "`1'" ~="" { use database1, clear keep if gender==1 display "ranksum GEOMETRIC MEAN fp3 by `1' " sort `1' quietly means fp3 local `gmeanfp3' = r(mean_g) ranksum `gmeanfp3' if `1'~=9999, by(`1') mac shift } end taball var1 var2 I can report the geometric means of my continuous variable across categories of var1, etc., but I want to test if there are differences in these geometric means of the continuous variable between those categories of var1, if that makes sense. I know that the local macro generates a constant, and thus the above would not work, however I can't think of alternatives at this point. Again, any suggestions would be appreciated. --- "Steichen, Thomas" <STEICHT@RJRT.com> wrote: > JL Greig writes: > > > I'm having a great deal of difficulty trying to do > > anovas, ranksums, regressions, etc. on the > geometric > > mean of a continuous variable--just capturing the > > saved results following a means command ofcourse > does > > not work, as below with ranksum: > > > > .quietly means fp3 > > .local `gmeanfp3' = r(mean_g) > > .ranksum `gmeanfp3' if `1'~=9999, by(`1') > > > > which gives me an error message of "_= invalid > name". > > > > Any suggestions at all would be much appreciated. > > JL, > > I think you need to be clearer about what you intend > to accomplish. > Please provide a more explicit description or > example of what > you are trying to do. > > Beyond that... it is very difficult to perform most > statistical > techniques when your variable is a constant (and > that is what you > have when you use -means- and a local macro). I'm > sure -ranksum- > is blowing out because it does not have a variable > to operate on... > `gmeanfp3' is a local macro, not a variable. > > Further, `1' may or may not be defined... but we > can't tell from > the code you show. > > Tom > > CONFIDENTIALITY NOTE: This e-mail message, > including any attachment(s), contains information > that may be confidential, protected by the > attorney-client or other legal privileges, and/or > proprietary non-public information. If you are not > an intended recipient of this message or an > authorized assistant to an intended recipient, > please notify the sender by replying to this message > and then delete it from your system. Use, > dissemination, distribution, or reproduction of this > message and/or any of its attachments (if any) by > unintended recipients is not authorized and may be > unlawful. > > __________________________________________________ Do you Yahoo!? Yahoo! News - Today's headlines http://news.yahoo.com * * 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**:**st: RE: geometric mean saved results***From:*"Steichen, Thomas" <STEICHT@RJRT.com>

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