Raphael Saldanha:
Based on the output you provided, apparently these NAs are either
ignored or treated as zeros. When you got a CV score as zero, you shall
be aware that there is definitely a problem (all the adaptive qs produce
the same 0, that means you are basically regression the dependent
variable on itself, no independent variables participate in the
regression (correct me if I am wrong).
I would suggest you investigate your data by exploring it with maps, and
see if it is possible to ether interpolate those NAs or pick them out
before you conduct a GWR analysis.
Hope this helps,
Danlin
Raphael Saldanha ??:
Hi!
I'm trying to use GWR with a dataset who has a lot of NAs. How spgwr
considers NAs?
As a test, I'm having the following results:
g.adapt.gauss.00 <- gwr.sel(pib00 ~ cv00 + le00 + ma00 + ou00, data=dados,
adapt=TRUE, coords=cbind(dados$x, dados$y))
Adaptive q: 0.381966 CV score: 0
Adaptive q: 0.618034 CV score: 0
Adaptive q: 0.763932 CV score: 0
Adaptive q: 0.854102 CV score: 0
Adaptive q: 0.90983 CV score: 0
Adaptive q: 0.944272 CV score: 0
Adaptive q: 0.9655581 CV score: 0
Adaptive q: 0.9787138 CV score: 0
Adaptive q: 0.9868444 CV score: 0
Adaptive q: 0.9918694 CV score: 0
Adaptive q: 0.994975 CV score: 0
Adaptive q: 0.9968944 CV score: 0
Adaptive q: 0.9980806 CV score: 0
Adaptive q: 0.9988138 CV score: 0
Adaptive q: 0.9992669 CV score: 0
Adaptive q: 0.9995469 CV score: 0
Adaptive q: 0.99972 CV score: 0
Adaptive q: 0.999827 CV score: 0
Adaptive q: 0.999893 CV score: 0
Adaptive q: 0.9999339 CV score: 0
Adaptive q: 0.9999339 CV score: 0
Houve 50 ou mais avisos (use warnings() para ver os primeiros 50)
res.adpt.00 <- gwr(pib00 ~ cv00 + le00 + ma00 + ou00, data=dados,
adapt=g.adapt.gauss.00, coords=cbind(dados$x, dados$y))
Erro em gwr(pib00 ~ cv00 + le00 + ma00 + ou00, data = dados, adapt =
g.adapt.gauss.00, :
new data matrix rows mismatch
Regards,
Raphael Saldanha
BRAZIL
saldanha.plan...@gmail.com
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--
___________________________________________
Danlin Yu, Ph.D.
Assistant Professor of GIS and Urban Geography
Department of Earth & Environmental Studies
Montclair State University
Montclair, NJ, 07043
Tel: 973-655-4313
Fax: 973-655-4072
email: y...@mail.montclair.edu
webpage: csam.montclair.edu/~yu
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