eigenvector

Posted by asghar on Dec 07, 2013; 12:39pm
URL: http://spssx-discussion.165.s1.nabble.com/eigenvector-tp5723495.html

Hello to all

I have below correlation matrix. I got eigenvalues and eigenvectors by using CALL EIGEN command in spss syntax. elements of eigenvector for first eigenvalue are negative. I did this analysis in SAS program. But elements of eigenvector for the first einenvalue are positive. could anyone please help to find the reason of this different results in two these softwares(SPSS and SAS). Please tell me, which is correct solution.


with best regards,
asghar



R={1.00 , .407, .315, .410 , .348;
     .407 ,  1.00 ,  .151, .220,  .220;
    .315,  .151,   1.00,  .400,  .077 ;
    .410,  .220,  .400, 1.00,  .160;
    .348,  .220, .077,  .160,   1.00}.



SPSS
Run MATRIX procedure:
 
A
  -.5519753361  -.1324885342  -.0380180912  -.1157827542  -.8141983758
  -.4189906133  -.3527569116  -.7427286539   .1498984098   .3548155024
  -.4076001635   .5931608825   .1222964640   .6790093781   .0775378203
  -.4802953099   .3906879012   .1154858899  -.6909341149   .3548977842
  -.3506402948  -.5945859744   .6470049115   .1602533429   .2814647639
 
B
   2.119374527
   1.026117465
    .770116074
    .590769943
    .493621991
 





                                          The SAS System      14:27 Thursday, December 7, 2013  13

                                                A

                                            2.1193745
                                            1.0261175
                                            0.7701161
                                            0.5907699
                                            0.493622


                                                B

                        0.5519753 0.1324885 -0.038018 -0.115783 -0.814198
                        0.4189906 0.3527569 -0.742729 0.1498984 0.3548155
                        0.4076002 -0.593161 0.1222965 0.6790094 0.0775378
                        0.4802953 -0.390688 0.1154859 -0.690934 0.3548978
                        0.3506403  0.594586 0.6470049 0.1602533 0.2814648