Do you have a Spatial Analyst license or access to one? If so there is a tool called Ordinary Least Squares that you might want to check out. I think you could also use the raster calculator (also requires a Spatial Analyst) with the syntax that is provided on that help page. If you are at the UW, it should be pretty easy to find a computer that has the full ArcGIS/ArcINFO licensing.
Otherwise, do a search for regression here and you might find a script: http://support.esri.com/index.cfm?fa=search.results ________________________________ From: Cathy Reidy Liermann [mailto:[email protected]] Sent: Friday, February 13, 2009 10:24 AM To: 'UW - GIS Discussion & Support' Subject: RE: [UW-GIS-L] regression Hi Stefan, it looks like I need ArcGrid Workstation ("Regression is a multivariate analysis that is available in ArcGrid Workstation.") I'm a basic user - any other ideas? >>>>>>>>>>>>>>>>>>>> Cathy Reidy Liermann Postdoctoral Researcher <<<<<<<<<<<<<<<<<<<<<<< University of Washington School of Aquatic and Fishery Sciences Campus Box 355020 Seattle, WA 98195 Phone: (+01) 206-685-9582 Fax: (+01) 206-221-6939 email: [email protected] <mailto:[email protected]> FOR DELIVERIES AND EXPRESS MAIL: UW-Fishery Sciences Building 1122 NE Boat Ste. Seattle, WA 98105 >>>>>>>>>>>>>>>>>>>> ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Stefan Coe Sent: Friday, February 13, 2009 9:41 AM To: UW - GIS Discussion & Support Subject: RE: [UW-GIS-L] regression Spatial Analyst has a regression feature- Type in regression in ArcGIS help to read about it. -Stefan ________________________________ From: Cathy Reidy Liermann [mailto:[email protected]] Sent: Friday, February 13, 2009 9:37 AM To: 'UW - GIS Discussion & Support' Subject: [UW-GIS-L] regression Hi all, Can anyone help me with regressing data from two grids in Arc? I used the sample tool to get the pair data, but there are >100000 records so Excel can't handle it. I'm just looking for a quick and dirty regression here - Excel would've sufficed. I need the equation and R2. I can't find how to do this in Access (looks like one needs to use forms or reports). Anyway, it seems like such a simple thing that Arc should have a tool for, no? Thanks, Cathy >>>>>>>>>>>>>>>>>>>> Cathy Reidy Liermann Postdoctoral Researcher <<<<<<<<<<<<<<<<<<<<<<< University of Washington School of Aquatic and Fishery Sciences Campus Box 355020 Seattle, WA 98195 Phone: (+01) 206-685-9582 Fax: (+01) 206-221-6939 email: [email protected] <mailto:[email protected]> FOR DELIVERIES AND EXPRESS MAIL: UW-Fishery Sciences Building 1122 NE Boat Ste. Seattle, WA 98105 >>>>>>>>>>>>>>>>>>>> ________________________________ All e-mail correspondence to and from this address is subject to the Washington State Public Records Act, which may result in monitoring and archiving, as well as disclosure to third parties upon request. -------------------------------------------------------------------- All e-mail correspondence to and from this address are subject to the Washington State Public Records Act, which may result in monitoring and archiving, as well as disclosure to third parties upon request.
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