hello Nikos, I would combine r.mapcalc and r.series. With r.mapcalc you could extract values below a certain threshold and do the r.series analysis based on this new dataset.
e.g. for i in `g.mlist pattern='pattern_of_your_raster*'` ; do r.mapcalc "$i_new = if($i < threshold, $i, null())" ; done r.series input="`g.mlist pattern='*_new' sep=,`" output=results method=sum regards, Martin On Montag, 7. Juni 2010 18:38:38 Nikos Dumakis wrote: > Thank you Martin. > > I realized that one of the functions that I need, (counter of values bellow > a certain threshold) is not available in r.series. Do you know, or do you > have any suggestion, how to perform this? > Thanks > > Best regards > Nikos > > On Mon, Jun 7, 2010 at 1:12 PM, Martin Wegmann < > > [email protected]> wrote: > > Hello Nikos, > > > > just give r.series a try. > > > > regards, Martin > > > > On Montag, 7. Juni 2010 14:06:17 Nikos Dumakis wrote: > > > Greetings > > > > > > > > > I have to do some simple-statistical TEMPORAL analysis between a long > > > data-series. I mean, I have do some temporal average for each pixel, > > > minimum and max. Instead of doing this statistical- analysis for all > > > pixels in an image, I have to do this analysis for each image-pixel > > > along its temporal series. > > > > > > Is there any function to do this? Or as anyone tried ? > > > Thanks > > > Nikos > > > > -- > > Dr. Martin Wegmann > > > > University of Wuerzburg > > Institute of Geography > > Department of Remote Sensing > > Remote Sensing and Ecosystem Research > > Am Hubland > > 97074 Wuerzburg, Germany > > @ > > German Aerospace Center (DLR) > > German Remote Sensing Data Center (DFD) > > > > Phone: +49-(0)931-31-83446 > > Fax: +49-(0)931-31-84961 > > Email: [email protected] > > url: http://www.remote-sensing.uni-wuerzburg.de > > url: http://www.dlr.de/caf > > url: http://www.global-change-ecology.de -- Dr. Martin Wegmann University of Wuerzburg Institute of Geography Department of Remote Sensing Remote Sensing and Ecosystem Research Am Hubland 97074 Wuerzburg, Germany @ German Aerospace Center (DLR) German Remote Sensing Data Center (DFD) Phone: +49-(0)931-31-83446 Fax: +49-(0)931-31-84961 Email: [email protected] url: http://www.remote-sensing.uni-wuerzburg.de url: http://www.dlr.de/caf url: http://www.global-change-ecology.de _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
