[R] 3-dimensional table

[Jim Lemon]

Jeffrey Stratford wrote:
> Hi,
> 
> Last week my class conducted an experiment by putting out clay
> caterpillars to look at the effects of urbanization, color, and location
> on caterpillar predation.  There were two sites (urban, rural), three
> colors (green, yellow, red) and two locations at each site (edge,
> interior).  The entire data set is below.  I've checked out the MASS
> book, Dalgaard's book, and the R-help archives and I haven't found
> anything that suggests how to set up a spreadsheet for the xtab function
> (say, xtab(predation ~ location + site + color, data=class).   It would
> not be a problem to input the data by hand but I wouldn't know how to
> set that up either.  Any suggestions would be greatly appreciated.  The
> class is mostly college sophmores and juniors and biology and education
> majors.  We are using R 2.2.1 on Windows XP.   
> 
Hi Jeff,

For some unknown reason, you used the name of a function that I wrote 
some years ago that may do what you want. Just call it the way you have 
above and it should work.

Jim

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