Displaying 4 results from an estimated 4 matches for "asciigrids".
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asciigrid
2004 Feb 26
6
adding header info to write.table
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
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2004 Feb 17
4
importing ascii grids (for gstat)
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
2009 Feb 21
1
Extracting xy from raster based on raster value
I have a raster (which I called glc), which I read
into R as a raster with "raster.create.from.file" from the raster package (R-forge). Values in glc range between 1 and 27 (whole numbers only). I'd like to extract all cells with a value of 1 to create
a new raster with only the cells that have a value of 1, or to extract
the xy values of all raster cells with a value of 1. Could you
2008 Nov 26
0
SVM
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 linea...