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| From | "Essendi H." <H.Essendi@soton.ac.uk> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: RE: FW: Running Polychoric Principal Component Analysis in STATA |
| Date | Fri, 24 Aug 2012 19:58:11 +0000 |
Hi, I have run my Polychoric PCA with 30 variables and these are my results. How do I extract the principal components? k Eigenvalues Proportion explained Cum. explained 1 9.875133 0.329171 0.329171 2 3.914605 0.130487 0.459658 3 2.199687 0.073323 0.532981 4 1.972968 0.065766 0.598746 5 1.806116 0.060204 0.658950 6 1.491586 0.049720 0.708670 7 1.057610 0.035254 0.743924 8 0.957563 0.031919 0.775842 9 0.876737 0.029225 0.805067 10 0.808630 0.026954 0.832021 11 0.721940 0.024065 0.856086 12 0.617829 0.020594 0.876680 13 0.568042 0.018935 0.895615 14 0.534358 0.017812 0.913427 15 0.474645 0.015821 0.929248 16 0.432420 0.014414 0.943662 17 0.394679 0.013156 0.956818 18 0.350109 0.011670 0.968489 19 0.317694 0.010590 0.979078 20 0.272341 0.009078 0.988156 21 0.266147 0.008872 0.997028 22 0.228569 0.007619 1.004647 23 0.182232 0.006074 1.010721 24 0.134601 0.004487 1.015208 25 0.073532 0.002451 1.017659 26 0.002814 0.000094 1.017753 27 0.000000 0.000000 1.017753 28 -0.000000 -0.000000 1.017753 29 -0.009973 -0.000332 1.017420 30 -0.522612 -0.017420 1.000000 scalars: r(lambda30) = -.5226117872285307 r(lambda29) = -.0099733429209876 r(lambda28) = -2.91788802401e-11 r(lambda27) = 2.91791708536e-11 r(lambda26) = .0028136759119166 r(lambda25) = .0735315467859793 r(lambda24) = .1346013978294836 r(lambda23) = .1822315003459927 r(lambda22) = .228568953051127 r(lambda21) = .2661472213481918 r(lambda20) = .2723408357592857 r(lambda19) = .3176943611403527 r(lambda18) = .3501089523760873 r(lambda17) = .3946787848401978 r(lambda16) = .432420025218819 r(lambda15) = .4746446780762609 r(lambda14) = .5343577888749866 r(lambda13) = .5680416974993906 r(lambda12) = .6178288336363039 r(lambda11) = .7219402529310105 r(lambda10) = .8086298902211778 r(lambda9) = .8767365013048373 r(lambda8) = .9575625979499038 r(lambda7) = 1.05760970715606 r(lambda6) = 1.491586326478875 r(lambda5) = 1.806116092435452 r(lambda4) = 1.972968399660107 r(lambda3) = 2.19968656497797 r(lambda2) = 3.914605324771372 r(lambda1) = 9.87513321956839 Thanks, HIldah -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Essendi H. Sent: 22 August 2012 15:00 To: statalist@hsphsun2.harvard.edu Subject: st: FW: Running Polychoric Principal Component Analysis in STATA Dear STATA, How can I run Polychoric principal component analysis in STATA? . I have likert scale data on wellbeing and I would like to prepare wealth quintiles based on these subjective responses. The challenge I am facing however is how to prepar e my variables before running this. I am not sure whether I need to recode them into dummy variables or just rung these with all the ordered category?. Also kindly advice on how to do this step by step. Many thanks, Hildah * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/