http://spssx-discussion.165.s1.nabble.com/Multi-Correspondence-Analysis-tp5721553p5721569.html
Oh, OK. This inspired me to RTFM, where I found that CA (as I would use it, for a matrix of species X samples) is not under Dimension Reduction>Correspondence Analysis, but rather under Dimension Reduction>Optimal Scaling>Multiple Correspondence Analysis.
Thanks for putting me onto that, though I do think it's just a teeny bit opaque to hide CA somewhere other than errr…. CA, just because it's _multiple_ CA. Especially when the syntax starts by calling the same procedure?
> Here is a response from the developer of the SPSS procedure.
>
> I'm on vacation, but I had quick look at it. First of all, SPSS CA is also per Greenacre 1984, thus results should be the same as with Ade-4. I searched the web for output of Ade-4 and found a document at
> ftp://pbil.univ-lyon1.fr/pub/mac/ADE/ADE4/DocThemPDF/Thema23.pdf
> containing a data example (data and syntax below). Results I see there are equal to SPSS. What is called eigenvalues in Ade-4 is inertia in SPSS. "Absolute contributions" in Ade-4 is "Contribution of points to inertia of dimension" in SPSS in the Overview Row/Column points table. What is called "factor" in Ade-4 is "Dimension" in SPSS.
> The plots do not look the same, but it is not clear to me at a quick glance what exactly is plotted in the document. It could be just a matter of different normalization, and/or standardization, and/or measure.
> I hope this is helpful, if not then it would be useful to send data, output and specific questions about the output
>
> data list free/rowid c7 TO c12 c1 TO c6 rowtot.
> begin data.
> 1 0 12 44 44 48 69 179 500 147 4 0 0 1047
> 2 4 4 30 16 20 11 17 75 70 1 0 0 248
> 3 0 7 9 13 7 14 18 74 16 0 0 0 158
> 4 1 0 0 3 5 6 11 98 6 0 0 0 130
> 5 0 4 38 18 21 9 16 87 218 51 2 0 464
> 6 0 1 2 5 3 7 1 11 14 2 0 0 46
> 7 1 0 3 2 0 7 5 1 0 1 0 0 20
> 8 0 7 28 17 9 4 9 9 10 2 0 0 95
> 9 0 4 8 12 2 3 5 5 1 0 0 1 41
> 10 1 12 20 13 9 2 0 0 2 1 0 0 60
> 11 1 43 31 7 2 1 1 1 4 5 0 1 97
> 12 4 68 53 15 3 0 0 0 0 5 25 7 180
> 13 0 14 3 0 0 0 0 0 0 0 7 1 25
> 14 3 184 105 34 5 0 0 0 0 11 83 13 438
> end data.
> CORRESPONDENCE
> TABLE = all (14,12)
> /DIMENSIONS = 2
> /MEASURE = CHISQ
> /STANDARDIZE = RCMEAN
> /NORMALIZATION = SYMMETRICAL
> /PRINT = TABLE RPOINTS CPOINTS rprof cprof
> /PLOT = NDIM(1,MAX) BIPLOT(20) rpoints cpoints.
>
>
> Jon Peck (no "h") aka Kim
> Senior Software Engineer, IBM
>
[hidden email]
> phone: 720-342-5621
>
>
>
>
> From: Ian Martin <
[hidden email]>
> To: Jon K Peck/Chicago/IBM@IBMUS, "
[hidden email]" <
[hidden email]>,
> Date: 08/13/2013 01:16 PM
> Subject: Re: Multi Correspondence Analysis
>
>
>
> Jon,
>
> I've looked at the CA as implemented in SPSS, and can't see how it equates to the CA I use frequently, which is in ADE-4 under R. The CA I use is as per Greenacre 1984
> Greenacre, M. J. (1984) Theory and applications of correspondence analysis, Academic Press, London.
> ADE-4:
> <
http://link.springer.com/article/10.1023%2FA%3A1018513530268>
>
> cheers,
> Ian
> Ian D. Martin, Ph.D.
> Environmental Analysis & Consulting
>
> On Aug 13, 2013, at 12:40 PM, Jon K Peck <
[hidden email]> wrote:
>
> > Multiple correspondence analysis is available in the Categories option (Analyze > Dimension Reduction > Correspondence Analysis).
> >
> > You can read the help for this online in the IBM Info Center at
> >
http://pic.dhe.ibm.com/infocenter/spssstat/v21r0m0/index.jsp> > under the Categories option.
> >
> > Jon Peck (no "h") aka Kim
> > Senior Software Engineer, IBM
> >
[hidden email]
> > phone: 720-342-5621
> >
> >
> >
> >
> > From: Vik Rubenfeld <
[hidden email]>
> > To:
[hidden email],
> > Date: 08/13/2013 10:27 AM
> > Subject: Re: [SPSSX-L] Multi Correspondence Analysis
> > Sent by: "SPSSX(r) Discussion" <
[hidden email]>
> >
> >
> >
> > Last time I looked into it, I did not find a way to do correspondence analysis with SPSS. However that was a few years ago. I would love to find a way to do CA in SPSS and I look forward to following this thread to find out if there is one at this time.
> >
> > However, you can do CA using R Project, using an R Project package such as "CA".
http://www.r-project.org/> >
> > Best,
> >
> >
> > -Vik
> >
> > On Aug 13, 2013, at 4:31 AM, mils <
[hidden email]> wrote:
> >
> > Hi everyone,
> >
> > I would like to run a Multi Correspondence Analysis (MCA). I used to run MCA
> > with xlstat, so I am a bit confused on how to use it in SPSS. I've attached
> > a file with the raw data and variables description.
> >
> > Do I have to transform the data?
> >
> > Any suggestions will be really appreciate it.
> >
> > Thanks in advance,
> >
> > Mils
> >
> > Multi_Correspondence_Analysis.xlsx
> > <
http://spssx-discussion.1045642.n5.nabble.com/file/n5721553/Multi_Correspondence_Analysis.xlsx>
> >
> >
> >
> >
> > -----
> > mils
> > --
> > View this message in context:
http://spssx-discussion.1045642.n5.nabble.com/Multi-Correspondence-Analysis-tp5721553.html> > Sent from the SPSSX Discussion mailing list archive at Nabble.com.
> >
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