topic Re: PCA using spearman rank correlation in SAS Procedures

PCA using spearman rank correlation

sophie33 — Tue, 06 Oct 2015 21:05:55 GMT

Hello,

I am trying to find some correlations between 11 variables (10 continuous variables (with 2 not normally distributed) and 1 categorial variable (1, 2, 3 or 4)). For that, I would like to start with a descriptive analysis using PCA. Regarding the kind of variables (and distributions) I have, I would like to perform a PCA using a matrix of Spearman's correlation. I have seen that we can do it with R software but I'm using SAS and I don't find any information about it, how to do it...

Do you have any idea of how I can do it (in which statement, syntax).

Thank you very much.

Sophie

Re: PCA using spearman rank correlation

Reeza — Tue, 06 Oct 2015 21:25:15 GMT

Look into PROC PRINCOMP and/or PROC FACTOR.

Re: PCA using spearman rank correlation

PGStats — Wed, 07 Oct 2015 03:52:50 GMT

Try, for example

proc corr data=sashelp.cars nomiss outs=carsSpear;
var invoice--length;
run;

proc princomp data=carsSpear n=2 plots=pattern;
var invoice--length;
run;

Re: PCA using spearman rank correlation

sophie33 — Wed, 07 Oct 2015 14:49:38 GMT

YES!!! It's working!!

Thank you very much!

Sophie