Date: Wed, 23 Oct 2002 10:39:46 +0200
Reply-To: Asesoría Bioestadística
<bioestadistica@eresmas.net>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Asesoría Bioestadística
<bioestadistica@eresmas.net>
Subject: Re: Factor Analysis help
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Hi Bruce:
This is a worked example I give to my students. I hope it will help you:
* FACTOR ANALYSIS FOR 8 PHYSICAL MEASURES IN 305 GIRLS
* AGED 7-17 YEARS (DATA FROM HARMAN).
* VARIMAX ROTATION.
* (1) Data entry *.
* ~~~~~~~~~~~~~~~~.
MATRIX DATA VARIABLES=ROWTYPE_ var1 var2 var3 var4 var5 var6 var7 var8.
BEGIN DATA
N 305 305 305 305 305 305 305 305
CORR 1.000
CORR .846 1.000
CORR .805 .881 1.000
CORR .859 .826 .801 1.000
CORR .473 .376 .380 .436 1.000
CORR .398 .326 .319 .329 .762 1.000
CORR .301 .277 .237 .327 .730 .583 1.000
CORR .382 .415 .345 .365 .629 .577 .539 1.000
END DATA.
VARIABLE LABEL VAR1 'HEIGHT' /VAR2 'ARM SPAN' /VAR3 'LENGTH OF FOREARM'
/VAR4 'LENGTH OF LOWER LEG'
/VAR5 'WEIGHT' /VAR6 'BITROCHANTERIC DIAMETER'
/VAR7 'CHEST GIRTH' /VAR8 'CHEST WID'.
* (2) Factor analysis with selected Nr. of factors *.
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.
FACTOR
/MATRIX = IN(cor=*)
/ANALYSIS var1 to var8
/FORMAT SORT BLANK(0.3)
/PRINT INITIAL KMO AIC FSCORE ROTATION
/PLOT EIGEN
/CRITERIA factors(2) ITERATE(25)
/EXTRACTION=PC
/CRITERIA ITERATE(25)
/ROTATION varimax .
Regards
Marta Garcia-Granero
Bruce Thompson ha escrito:
> I would like to input a factor pattern matrix from an article into SPSS
> using the SPSS command "FACTOR MATRIX=IN(FAC= )", and then rotate this
> matrix using an algorithm different than that used by the Au. The SPSS
> Manual is too obscure to follow on how to do this.
> Anybody have any suggestions or an example syntax? Thanks!
>
> Bruce Thompson
>
> "What Future Quant Soc Science Could Look Like..."
> http://www.aera.net/pubs/er/pdf/vol31_03/aera310309.pdf
>
> http://www.coe.tamu.edu/~bthompson
