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coefficents
2007 Jan 30
2
R and S-Plus got the different results of principal component analysis from SAS, why?
...and SAS/STATA/SPSS, and then show
the original dataset, hoping sb. to try and explain it.
SAS,STATA,and SPSS have the same results, so i put them together. From
their results, we see that the absolute values of coeffiecient are same, but
PC1,PC2,PC4,PC5 and PC6 in R have the opposite sign on the coeffiecnts
contrast with SAS, and PC4,PC5 in S-PLUS have the opposite sign on the
coeffiecnts contrast with SAS. Curiously, I got the same results amont all
these software using my another dataset.
*R's results of PCA:*
*PC1* *PC2* PC3 *PC4* *PC5 * *
PC6*
X1...