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 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
