[R-sig-Geo] SPGWR Application to Holdout Sample

2014-04-29 Thread Paul Bidanset
Hello, I was just curious - am I safe in assuming that when applying holdout data (new data points not included in model calibration) to GWR models in the SPGWR package (as below), each new point is applied to the local regression model in closest geographic proximity? * PredictionsOfNewData -

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-09-04 Thread Paul Bidanset
Fantastic. Thank you so much. On Wed, Sep 4, 2013 at 5:08 AM, Roger Bivand roger.biv...@nhh.no wrote: On Tue, 3 Sep 2013, Paul Bidanset wrote: Thank you very much for the example and the clarification. My hold out test is random. The vector provided by gw.adapt() allows me to see

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-09-03 Thread Paul Bidanset
, 2013 at 3:54 PM, Roger Bivand roger.biv...@nhh.no wrote: yOn Fri, 30 Aug 2013, Roger Bivand wrote: On Fri, 30 Aug 2013, Paul Bidanset wrote: Thank you. I'd like to subset into a specific county. Should there be further partitioning from that level? No idea. Please re-create your scenario

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-08-30 Thread Paul Bidanset
mean, you have to obtain new local models (one for each point to be fitted), so I do not understand whether the data parameter is used somehow... Best regards, Luis On Fri, Aug 30, 2013 at 1:26 AM, Paul Bidanset pbidan...@gmail.com wrote: Hi Folks, I was curious if anyone has had

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-08-30 Thread Paul Bidanset
, so you have to show what you mean in code. Roger On Fri, 30 Aug 2013, Paul Bidanset wrote: Roger, I think all I would like to know is if it is possible to apply a calibrated GWR model to a hold-out sample, and if so, what the most accurate way to do so is. I understand the pitfalls

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-08-30 Thread Paul Bidanset
Thank you. I'd like to subset into a specific county. Should there be further partitioning from that level? On Fri, Aug 30, 2013 at 10:19 AM, Roger Bivand roger.biv...@nhh.no wrote: On Fri, 30 Aug 2013, Paul Bidanset wrote: Alrighty then! Thanks. Now make this your case by subsetting

[R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-08-29 Thread Paul Bidanset
Hi Folks, I was curious if anyone has had experience applying an SPGWR model with an adaptive bandwidth matrix to a holdout or validation sample. I am using the fit.points command, which does not seem to allow for a new bandwidth calibrated around the holdout samples XY coordinates. Any direction

Re: [R-sig-Geo] Holdout Sampling Adaptive Bandwidth SPGWR

2013-08-29 Thread Paul Bidanset
parameter to the data to be fitted (introduced in the fit.points parameter)? I mean, you have to obtain new local models (one for each point to be fitted), so I do not understand whether the data parameter is used somehow... Best regards, Luis On Fri, Aug 30, 2013 at 1:26 AM, Paul Bidanset

[R-sig-Geo] SPGWR - gw.adapt() command question

2013-07-10 Thread Paul Bidanset
Hello all, I am doing some exploratory analysis with adaptive and fixed kernels in the SPGWR package. I am hoping to glean further insight from someone who has a better understanding of the gw.adapt(dp, fp, quant, longlat=FALSE) command. I understand 'quant' is proportion of data points to