Dylan Beaudette wrote: > On Friday, October 07, 2011, Markus Metz wrote: >> There is a new module r.regression.multi as grass7 add-on to calculate >> multiple regressions with raster maps. The motivation for this module >> is to calculate regression coefficients and statistics for very large >> datasets, too large for e.g. R. The module uses less than 3 MB memory >> for 400 million cells with one response variable and 8 predictors. >> Including residuals, this makes a total of 4 billion numbers. >> Calculation takes about 4 minutes for this dataset on my laptop. In >> addition to the slope estimates, statistics provided are R squared, >> adjusted R squared, F, AIC, corrected AIC, BIC for the full model, and >> F, AIC, corrected AIC, BIC for each predictor. Results are identical >> to those produced by R (with smaller test datasets). >> >> Markus M >> _______________________________________________ >> grass-stats mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/grass-stats >> > > Very cool. Can this module fit models from point data, and produce predictions > in the form of a raster?
Yes, as of r49130. Residuals are also available as output raster. Markus M _______________________________________________ grass-stats mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-stats
