Hello all,
I'm dealing with geochemical analyses of some rocks.
If I use the full composition (31 elements or variables), I can get
reasonable separation of my 6 sources. Then when I go onto do LDA with the
6 groups, I get excellent separation.
I feel like I should be reducing the variables to thos that are providing
the most discrimination between the groups as this is important information
for me. I struggle to interpret the PCA plot in a way that helps me (due to
the large number of elements). So I'm trying to do some sort of step-wise
variable selection.
I would love to hear from someone (possibly a geochemist or similar) who
does this regularly to determine the best course of action in R to do this.
Thanks very much
--
Gareth Campbell
PhD Candidate
The University of Auckland
P +649 815 3670
M +6421 256 3511
E [EMAIL PROTECTED]
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