[GRASS-user] i.pca gives error

Markus Neteler neteler at osgeo.org
Fri Apr 4 05:14:08 PDT 2014

On Fri, Apr 4, 2014 at 1:47 PM, Martin van Brakel
<m.l.vanbrakel at gmail.com> wrote:
> Hi list,
> i am processing plenty of modis subsets into a group called "pca"
> when using WinGRASS it gives an error
> GRASS 7.0.svn> i.pca --overwrite input=pca output_prefix=_msub
> Computing covariance matrix...
>  100%
> ERROR: No non-null values
> GRASS 7.0.svn>

Did you set the computational region to the map beforehand?

g.region rast=pca -p

i.pca ...

See also:
Since we currently have issues on the server (slow), see also the wiki
mirror at:

hope this helps

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