[R] R and S-Plus got the different results of principal component analysis from SAS, why?

2007-01-30 Thread zhijie zhang
Dear Rusers, I have met a difficult problem on explaining the differences of principal component analysis(PCA) between R,S-PLUS and SAS/STATA/SPSS, which wasn't met before. Althought they have got the same eigenvalues, their coeffiecients were different. First, I list my results from

Re: [R] R and S-Plus got the different results of principal component analysis from SAS, why?

2007-01-30 Thread Peter Dalgaard
zhijie zhang wrote: Dear Rusers, I have met a difficult problem on explaining the differences of principal component analysis(PCA) between R,S-PLUS and SAS/STATA/SPSS, which wasn't met before. Althought they have got the same eigenvalues, their coeffiecients were different. First,

Re: [R] R and S-Plus got the different results of principal component analysis from SAS, why?

2007-01-30 Thread Gavin Simpson
On Tue, 2007-01-30 at 22:29 +0800, zhijie zhang wrote: Dear Rusers, I have met a difficult problem on explaining the differences of principal component analysis(PCA) between R,S-PLUS and SAS/STATA/SPSS, which wasn't met before. Althought they have got the same eigenvalues, their