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constanti
2013 Feb 06
1
how to extract test for collinearity and constantcy used in lda
Hi everyone,
I'm trying to vectorize an application of lda to each 2D slice of a 3D
array, but am running into trouble: It seems there are quite a few 2D
slices that trigger either the "variables are collinear" warning, or worse,
trigger a "variable appears to be constant within groups" error and fails
(i.e., ceases computation rather than skips bad slice).
There are