On Tue, Mar 26, 2013 at 8:39 AM, Rashad M <[email protected]> wrote: > Hi, > > i.pca creates 6 raster maps for 6 input raster > > eg: > > i.pca > in=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 > \ > out=lsat7_2002_pca > > > I have a doubt here > > Does the output lsat7_2002_pca.1 is the corresponding map for lsat7_2002_10?
No. lsat7_2002_pca.1 contains the principal component with the highest eigenvalue and is calculated using all input bands. More generally, each lsat7_2002_pca.* map is calculated using all input bands. Look at the eigenvectors to find out the weights with which each input map contributes to a specific PCA. Markus M > > If so the lsat7_2002_10_pca.1 contains PCA transformed pixel for > lsat7_2002_10 > > Is this correct? > > -- > Regards, > Rashad > > _______________________________________________ > grass-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-dev _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
