#576: i.pca fails to center data prior to analysis
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Reporter: nikos | Owner:
grass-dev@…
Type: defect | Status:
new
Priority: normal | Milestone:
6.5.0
Component: Raster | Version:
svn-develbranch6
Keywords: i.pca, data centering, prcomp(), R, eigenvectors | Platform:
Unspecified
Cpu: Unspecified |
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Comment(by mmetz):
Replying to [comment:1 mmetz]:
>
> I get identical results with i.pca in trunk r49090 if I create a MASK
first, thus excluding any NULL cells (some cells are NULL in one band but
not NULL in another band).
Calculating a MASK in order to get results identical to ''prcomp(x,
center=TRUE, scale=FALSE)'' is no longer needed as of r49092.
Markus M
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Ticket URL: <https://trac.osgeo.org/grass/ticket/576#comment:2>
GRASS GIS <http://grass.osgeo.org>
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