[R] PCA - princomp can only be used with more units than variables

From: Srinivas Iyyer <srini_iyyer_bio_at_yahoo.com>
Date: Sun 27 Mar 2005 - 01:34:29 EST


Hi all:
I am trying to do PCA on the following matrix.

            N1     N2    A1      A2     B1     B2
gene_a      90    110    190    210    290    310
gene_b     190    210    390    410    590    610
gene_c      90    110    110     90    120     80
gene_d     200    100    400     90    600    200


>dataf<-read.table("matrix")

> pca<-princomp(dataf,cor=TRUE,scores=TRUE)
Error in princomp.default(dataf, cor = TRUE, scores = TRUE) :
        princomp can only be used with more units than variables

Can any one help me, whats wrong here.

thanks
srini



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