Hi,all! How to calculates linear regression from three or more raster maps （X1 = a + bX2 + cX3 +dX4 + ...)? Thanks! Best Regard! dehui -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20130222/1328aa93/attachment.html>