R help - Sep 2010 - Compare two 3d plots

Hi,


I am still learning and find it very helpful in my research. I have searched 
before posting this and could not figure out if there is a way to compare 
matrices the way i am describing below:

I have a matrix of 64 cols and 64 rows which mostly has lots of zeros but has 
other non-zero positive integers (usually grouped close to each other) in the 
matrix. I use persp to get a 3d plot and it looks like a mountain with its peak 
roughly in the center. I have several such matrices all 64-by-64 but with 
different integers in the matrix such that the mountains look very different.

Problem:
If I overlay one 64-by-64 matrix over another, there will be many differences in
the mountains (such as, height[this is easy], shift towards one direction, 
surface area[PeakArea from library sp], circumference), I want to quantify those
differences. I have some of them figured out but want your inputs to this. I 
want to be able to compare several mountains with one another and rate them for 
similarity/differences with one another.  

Any help would be great.

Thanks,
Ab

Hello,

You probably know this already but there are many textbooks on Group theory
in statistical processes. 

Although this book may not help you, the authors may be able to lead you in
the right direction:

http://www.nd.com/products/nsbook.htm Neural Solutions 


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