Christian --
-mca- cannot cope with the non-integer values of headroom.
Try
.. gen hd = 10 * headroom
.. mca foreign rep78 hd, d(3)
Tom
Thomas J. Steichen
[email protected]
----------------------------------------------------------------------------
Facts do not cease to exist because they are ignored. - Aldous Huxley
----------------------------------------------------------------------------
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of
> Christian Holz
> Sent: Thursday, July 07, 2005 10:09 AM
> To: [email protected]
> Subject: st: Error in -mca- and -coranal- (correspondence analysis)
>
>
> Dear Stata-Listers,
>
> I have to perform some correspondence analyses and did
> therefore download the mca.ado and coranal.ado of Philippe
> Van Kerm (University of Namur, BE) from stata.com.
> Unfortunately both ados always produce an error r(198)
> "operator invalid" after the output of the principal inertia
> components. Obviously there is something wrong in the ado
> file itself. Is it possible that I experience a version
> incompatibility here (the ados were written for version 5 -
> I, myself, use 8.2)? Did anyone experience the same problem
> and found a solution/workaround? Here the example from the
> help files for -mca- and the output I get:
>
> . sysuse auto
> (1978 Automobile Data)
>
> . mca foreign rep78 headroom, d(3)
> --------------------------------------------------------------
> --------------
> --
>
> MULTIPLE CORRESPONDENCE ANALYSIS
>
> --------------------------------------------------------------
> --------------
> --
>
>
> Total Inertia : 0.431
>
> Principal Inertia Components :
>
> Inertia Share Cumul
> Dim1 0.308 0.713 0.713
> Dim2 0.060 0.138 0.851
> Dim3 0.039 0.090 0.941
> headr_1: operator invalid
> r(198);
>
>
> Help is as always very much appreciated!
> Cheers,
>
> Christian Holz
> Department of Sociology, Anthropology and Applied Social
> Sciences University of Glasgow Scotland, U.K.
>
> *
> * For searches and help try:
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
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