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st: RE: 3 dimensions plot after pca


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: 3 dimensions plot after pca
Date   Tue, 22 Jun 2010 13:12:08 +0100

Stata does not provide much (officially, none) support for 3-D graphics
and what there is that is user-written does not match in quality what is
readily available elsewhere. 

In this particular case, the data points defining PCs are most unlikely
to define a smooth surface (and if they do, PCA is the wrong method) and
so any 3-D view is unlikely to be much good in any case. I'd suggest a
scatter plot matrix as probably a much better bet. 

Nick 
n.j.cox@durham.ac.uk 

mmolina@uniroma3.it

After running pca I need to plot the PC scores of the firs three PC. Is
it
possible to have three dimensions graphs?

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