GWAR - R
Hi Roger Thanks for your response. I am not sure why there can't be polygons with missing info. Is it something with the model or the estimation? Also, How can I drop the NA's from a shape file in R? I've tried but can't seem to be able to do it. Thanks Inaki
On 24 Sep 2011, at 08:27, "Roger Bivand" <Roger.Bivand at nhh.no> wrote:
On Thu, 22 Sep 2011, Inaki Sagarzazu wrote:
Hi, I am trying to use gwr in R but I'm having problems because some of my polygons have missing values (NA) for the variables of interest. Do you have any suggestions on how to solve this?
If data is missing in the response or covariates, all bets are off. You could drop those observations, or incomplete variables. You could try to impute the values, but then standard results would not hold downstream. Roger
thanks --------------------------------------------------------------------------------------------------------------- I?aki Sagarzazu, PhD Research Officer Nuffield College University of Oxford OX1 1NF Oxford United Kingdom Office: 44 (0) 1 865 614990 Inaki.Sagarzazu at nuffield.ox.ac.uk http://www.inaki-sagarzazu.com
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-- Roger Bivand Department of Economics, NHH Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no