Date: Wed, 17 Sep 2003 10:33:04 +0100
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: John McConnell <email@example.com>
Subject: Re: SPSS chokes, SAS computes principal components
Content-Type: text/plain; charset="us-ascii"
I think Paul is probably spot on w.r.t. missing values.
SPSS Answernet reiterates and adds further references...
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> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf
> Paul Dickson
> Sent: 17 September 2003 02:11
> To: SPSSX-L@LISTSERV.UGA.EDU
> Subject: Re: SPSS chokes, SAS computes principal components
> Hi Sally,
> On further thought, it is possible that this is occurring purely
> you are
> using pairwise deletion in SPSS. The matrices in this case are being
> from a different set of cases each time. Try listwise deletion to
> with, though I
> would never use this in my analyses and see if that makes any
> By trying a different method of handling missing data you should see
> your choice of treatment of missing data is the cause
> Cheers again Paul
> > Sally Zitzer <firstname.lastname@example.org> wrote:
> > I have a client who is trying to run factor analysis (principal
> > components) in SPSS using pairwise deletion but gets the message
> > "nonpositive definite matrix". When the same data is run in SAS
> > proc princomp SAS proceeds to do the analysis with no problem.
> > I just wondered if anyone on the list knows why SPSS comes to a
> > complete halt? (my client is unhappy because she has only SPSS
> > and can't get SAS, she is in a university in Turkey).
> > Thanks,
> > Sally in Seattle
> > Sally Zitzer, C&C, Senior Computing Specialist, Statistical Software
> > email@example.com or firstname.lastname@example.org (206)-543-8515