-------- Forwarded Message -------- > From: Markus Metz <[email protected]> > To: [email protected], grass-user > <[email protected]> > Subject: [GRASS-user] new module for multiple regression with large > raster maps > Date: Fri, 7 Oct 2011 11:34:20 +0200 > > 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-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user
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