Hi all,
I think the problem is coming from handling missing values.
It seems that MAKEMATRIX is making 'listwise deletion' ie, any observation
which have a missing value in at least one of the 5 variables, is just
deleted. So the means are computed over the 1351 observations (the same for
all the variables) rather than the 1442 to 1584 observation in the SUMMARIZE
command
Regards
Naji Nassar
-----Message d'origine-----
De : [email protected]
[mailto:[email protected]]De la part de Nicola
Tommasi
Envoye : lundi 13 octobre 2003 08:45
A : [email protected]
Objet : st: Mime-Version: 1.0
dear all,
I believe there is a bug in the makematrix command.
Evidence of bug :
. summ d09a_rc d09b_rc d09c_rc d09d_rc score_9;
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
d09a_rc | 1478 .7814614 .9512177 -2 2
d09b_rc | 1442 .9036061 .9401232 -2 2
d09c_rc | 1529 1.204709 .875393 -2 2
d09d_rc | 1493 1.139317 1.007686 -2 2
score_9 | 1584 1.000053 .7941874 -2 2
. makematrix tab9tot, from( r(N) r(mean) r(sd) r(min) r(max) ): su d09a_rc
d09b_rc d09c_rc d09d_rc score_9;
tab9tot[5,5]
N mean sd min max
d09a_rc 1351 .78756477 .94986591 -2 2
d09b_rc 1351 .92376018 .94168773 -2 2
d09c_rc 1351 1.2398224 .85734195 -2 2
d09d_rc 1351 1.1591414 .9980665 -2 2
score_9 1351 1.0275722 .77329762 -2 2
Nicola Tommasi
-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-
dott. Nicola Tommasi
Centro Interdipartimentale di Documentazione Economica (C.I.D.E)
University of Verona
via dell'Artigliere, 19
37129 Verona (Italy)
tel.: +39-045-8028048
fax.: +39-045-8028047
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