[GRASS-dev] reg i.pca module

[Nikos Alexandris]

Rashad M wrote:

> > Hi All,
 
> > i.pca outputs raster bands and the pixel values are transformed
> > obivously. But anyone can tell me how the transformation works

> > if a pixel P1 has value X after i.pca it will be Y

> > Is there any specific math equation that is applied to every pixel by PCA?

Moritz Lennert wrote:
 
> http://en.wikipedia.org/wiki/Principal_component_analysis
> and
> http://grasswiki.osgeo.org/wiki/Principal_Component_Analysis

Ehm, right --  I've overlooked your post Moritz, apologies.

Nikos
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