[R] How to combine to PCAs

[bady at univ-lyon1.fr]

hi, hi all,

There are several methods to analyse two (e.g. coinertia, procuste)
or K tables (e.g. statis, mfa, gpa, etc.) in the packages ade4, FactoMiner, etc.
Otherwise analyses on instrumental variables can be an interesting way to
explore your dataset (e.g. within/between analyses, etc.)

hope this help

pierre


Selon Stefan Koenig <st.koenig at gmx.net>:

> Dear all:
>
> Subjects were measured two times (t1 and t2) on different variables (v1 ...
> vn).
> Between t1 and t2 there was an experimental manipulation. I computed two PCAs
> for time-points t1 and t2.
>
> Is it possible to combine both PCAs in order to get only one set of
> eigenvectors? Due to the experimental manipulation measurement values on time
> points t1 and t2 changed for each subject.
>
> Many thanks
> Stefan
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