This is probably a basic question, but I haven't been able to Google
anything helpful after trying for days.
I have an R dataframe with x,y,z tuples, where z is a response to x and y
and can be modeled as a surface.
> head(temp)
x y z
1 36.55411 965.7779 1644.779
2 42.36912 978.9721 1643.957
3 58.34699 1183.7426 1846.123
4 53.55439 1232.2696 1990.707
5 50.76167 1115.2049 1281.988
6 51.37299 1059.9088 1597.028
I would like to create a matrix of mean z values, with rows representing
binned y values and columns representing binned x values, like
0<x<40 40<x<60 60<x<80 x>80
0<y<800 1000.0 1100.00 1100.00 1000.0
800<y<1200 1000.0 1200.00 1200.00 1000.0
1200<y<1400 1000.0 1200.00 1200.00 1000.0
y<1400 1000.0 1100.00 1100.00 1000.0
thanks
Mark
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