[R-sig-Geo] histogram of SpatialGridDataFrame values

Nick Matzke matzke at berkeley.edu
Fri Aug 5 04:04:56 CEST 2011

Nevermind, got it: as.matrix(dem)

On 8/4/11 5:06 PM, Nick Matzke wrote:
> Hi,
> So I've loaded a DEM into a SpatialGridDataFrame, and I can
> plot it etc.
> However, I would like to make a histogram of the pixel
> values (or just a random sample of the pixel values) to help
> make decisions about the color scheme etc. Is there an easy
> way to do this?
> Cheers!
> Nick

Nicholas J. Matzke
Ph.D. Candidate, Graduate Student Researcher

Huelsenbeck Lab
Center for Theoretical Evolutionary Genomics
4151 VLSB (Valley Life Sciences Building)
Department of Integrative Biology
University of California, Berkeley

Graduate Student Instructor, IB200B
Principles of Phylogenetics: Ecology and Evolution

Lab websites:
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Email: matzke at berkeley.edu

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Berkeley, CA 94720-3140

"[W]hen people thought the earth was flat, they were wrong. 
When people thought the earth was spherical, they were 
wrong. But if you think that thinking the earth is spherical 
is just as wrong as thinking the earth is flat, then your 
view is wronger than both of them put together."

Isaac Asimov (1989). "The Relativity of Wrong." The 
Skeptical Inquirer, 14(1), 35-44. Fall 1989.

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