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Hi list members, I have seen this post (http://r-sig-geo.2731867.n2.nabble.com/Clip-a-raster-tt5635474.html#a5639429) but I am wondering if there is a more straightforward way have rasterize include ALL of the cells...

Hi List, I am wanting to do a modified t-test to account for auto-correlation, similar to Dutilleul 1993 (Dutilleul, P. (1993) Modifying the t test for assessing the correlation between two spatial processes. Biometrics 49, 305?314.). I...

My overall analytical goal is to take the mean (and later min and max) data of a small resolution raster within the grid cells of a larger resolution grid. I can do this using points via extract but can't...

I have a dataset that consists of point coordinates and values associated with the points.? I want to be able to grid the values, and then do calulations using the values using the various raster functions.? I am, however, finding...

Hi Rafael I am working on Mac 10.7.2 (Lion). Cheers, Tara On Fri, Jan 20, 2012 at 9:58 AM, Rafael W?est <rafael.wueest at wsl.ch> wrote: > Hi Tara > > what operating system are you working on...

I am trying to determine the unique values within a raster, but am having trouble. Here is some sample base data: require(raster) r <- raster(ncol=10, nrow=10) r[]=1:ncell(r) x <- c(-45, -45, -45, 30, 30...

I have also been having difficulties in the raster package. I had a hard drive crash and installed 2.13 on my new computer but had difficulty with the rgdal package, so I switched back to 2.12. Now I...

Thank you Robert. That worked perfectly. I had been missing the proper structure in using the rasterize function. Tara On Sat, Sep 17, 2011 at 5:42 PM, Robert J. Hijmans <r.hijmans at gmail.com> wrote: > Arnaud, > > You can...

Thanks Rafael, I was able to instal rgdal etc alright, but when I went to do anything with the rasters, that was when I hit problems - I was told I was out of memory (which made no sense). I suppose...

That was it - works perfectly now. Thank you Robert. Tara On Wed, Sep 21, 2011 at 10:49 AM, Robert J. Hijmans <r.hijmans at gmail.com> wrote: > Tara, > raster_ct<- rasterize(coord.plus.value_sp, r, > fun=function(value...