[GRASS-user] Calculating eigen values and % variance explained after PCA analysis

[Nikos Alexandris]

Wesley:
> I see that I would need to upgrade to 6.4 using svn. I currently
> install using synaptic, does this mean I need to compile from source
> and then add the m.eigensystem addon?
> Not sure about f77, is this a fortran compiler? I have gfortran
> compiler version 4.2.3, will this do?

(@Hamish: apologies for the interference :-p)

Wesley,

perhaps it's better to upgrade to 6.4 (or why not to grass6_devel =
grass65 ?). grass needs to be compiled first (don't install), then
compile m.eigensystem and install in the end grass.

I don't know if gfortran will help you. But you can install fort77 and
f2c under ubuntu:

# from "apt-cache search fort77"
f2c - A FORTRAN 77 to C/C++ translator
fort77 - Invoke f2c like a real compiler

If you have success running m.eigensystem, can I please ask you to let
the list (and me :-p) know about it? I compiled m.eigensystem without
errors but it doesn't seem to work within from grass65. I am currently
re-compiling grass6_devel to see whether it will work or not.

Or do I need to work with grass6.4?

Kind regards, Nikos