I would suggest you post this on the r-sig-ecology or r-sig-geo lists.
These seem both more relevant (r-help is for general R programming
questions, mostly) and more likely to have participants with suitable
expertise.
Cheers,
Bert
On Wed, Sep 11, 2013 at 12:32 PM, Maria Fernanda Bonetti <
fernanda_bone...@hotmail.com> wrote:
> I need to extract climatic variables of many shapefiles. I managed to do
> it, but doing one at a time (I have to do this for 3000 species).
> Well, I did the following:
> first I downloaded the rasters of BIOCLIM> bios <-getData ("Worldclim" var
> = "bio", res = 2.5, T = download)
> Ok, then I went with shapes (2 species did just to test).> teste_sp1
> <-readShapePoly ("sp1", IDVAR = NULL, proj4string = CRS (as.character
> (NA)), verbose = FALSE, repair = FALSE, FALSE = force_ring, delete_null_obj
> = FALSE, retrieve_ABS_null = FALSE)
> Finally, I used a function to extract the variables of shapes> v <-
> extract (bios, sp1)
>
> THE PROBLEM:The sp1 is a multi part polygon (23 features). I could make
> the average of these 23 lines and everything would be ok right? The problem
> is that some lines appears NA, and I have no idea why, and I can not just
> ignore that.
> Do I need to join these parts into a single polygon? I tried this with
> "unionSpatialPolygons" but another error appears: Error in
> unionSpatialPolygons (sp1, IDS, threshold = NULL,: input lengths differ
> Can anyone help me?
>
> Att,
> Maria Fernanda BonettiDoutoranda do Programa de Pós Graduação em Ecologia
> e Conservação - UFPRMestre em Ecologia e ConservaçãoPesquisadora do
> Instituto de Pesquisas Cananéia - IPeC
> [[alternative HTML version deleted]]
>
>
> ______________________________________________
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> PLEASE do read the posting guide
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>
>
--
Bert Gunter
Genentech Nonclinical Biostatistics
Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
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