RE: st: RE: Changing -correlate- results

["louis boakye-yiadom" <louisby@hotmail.com>]

Nick and Scott, thank you very much. I'm really learning a lot from 
statalist. I'll try both -egen- and the "stable" option of -sort-.

Louis





> From: "Scott Merryman" <smerryman@kc.rr.com>
>
> Tied values are randomized.  From the helpfile:
>
> "Note: ties in the sort index (i.e., identical sorting values) are broken 
> in
> an arbitrary (i.e., random) order, unless the stable option is specified."
>
> You might try:
>
> sort f1, stable
>
> sort f2, stable
>
> Hope this helps,
> Scott
>
> > -----Original Message-----
> > From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> > statalist@hsphsun2.harvard.edu] On Behalf Of louis boakye-yiadom
> > Sent: Monday, March 21, 2005 6:09 AM
> > To: statalist@hsphsun2.harvard.edu
> > Subject: st: Changing -correlate- results
> >
> > Dear All,
> > Apologies for the garbled form of my last mail.
> > A -correlate- command in my do file gives slightly different results 
> each
> > time the file is executed. For example, for the last three times the 
> file
> > was executed, the correlation coefficient between the same two variables
> > (rankf1 and rankf2) were as follows: 0.7466, 0.7499, and 0.7524. I'm
> > baffled
> > by this, and I don't find any explanation from the -help- for 
> -correlate-.
> > I've provided excerpts of the do file. Any help will be appreciated.
> > Thank you.
> >
> > use isocomb_indices, clear;
> > sort f1;
> > list region district dmrd dmkt dpt djss dchp fl, clean header(50);
> > gen rankf1=_n;
> > sort f2
> > list region district pwrd pwmkt1 pwmkt2 pwjss pwchp f2, clean 
> header(50);
> > gen rankf2=_n;
> > bysort region: list region district nc f1 rankf1 f2 rankf2, clean 
> mean(f1
> > rankf1 f2 rankf2);
> > correlate rankf1 rankf2;
> > drop rankf1 rankf2;
> > sort region district;
> > save isocomb_indices, replace;
> > clear;
> > log close;
> > exit;
> >
> > Louis
> >
> >
>
>
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