search for: asciigrid

Hello, Could someone please tell if there is a way to append header info to the top of an exported dataframe (exported with write.table). I want to append the following, which are the defininitions for an asciigrid: ncols 532 nrows 999 xllcorner 510465 yllcorner 4766375 cellsize 30 NODATA_value -9999 Thanks very much, femke [[alternative HTML version deleted]]

Hello, Is there anyone who could give me an example of how to import an ascii grid (i.e. ArcGIS exported raster) into R. I want to use it with gstat but don't know the appropriate import routine. Thanks very much for your help. Regards, femke Femke Reitsma Graduate Student (ABD) Geography Department 2181 LeFrak Hall University of Maryland College Park, MD 20742 Phone: 301-405-4121

...glc=1. I have tried to use e.g.: glc1<-raster.get.xy.from.cell(glc,glc==1) glc1<-raster.get.xy.from.cell(glc, glc[which(glc==1)]) The reason I specifically used the raster package to read in my files is because I have been unable to read my ascii files (which are very big) into R using read.asciigrid because the ascii files are so big (and none of the various suggestions I found in various R-help archives that I found for increasing memory size were sufficient to allow me to read in my ascii files). Therefore if alternatively somebody knows of another way to read raster or ascii files into R, w...

Hi All, I fitted several classifiers in a two class problem. I then used the package 'yaImpute' - to apply my predictive models to asciigrids and thereby generate a probability maps. So far I successfully used yaImpute to generate maps for Random Forests, Classification trees, Generalized Linear Models (GLMs) and Generalized Additive Models (GAMs). But when I try to use it to two other classifiers - support vector machine (SVM) and line...