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...t will always calculate the first and always have an error on the second. Am I misusing the garbage-collector? I am confused by the fact that the difference between 'trigger' and 'used' seems so much higher than the size of vector that it says it can't allocate. thanks, Sam Yeaman

...fferent, I have no way of knowing if mc vs. mh is significantly different by examining the other contrasts. Sorry if these questions are ignorant...I have spent a long time trying to figure it out and haven't found the answer in either the available books or the help list. Many thanks, Sam Yeaman

...greatly appreciate it. The closest thing I can think of is to use scatterplot3d() and then add a plane3d object, but I'd like to have a surface rather than a point cloud. I got two surfaces to appear using persp() and par (new = TRUE), but the second surface obscures the first. Thanks, Sam Yeaman UBC Department of Zoology

Hi list folks, I have been trying to figure out how I can run the script that I have included below. I have 1.2 gigs of memory on the computer, but this is not enough, given the size of the input datasets. The input matrix ('input') is a little under 2400 x 2900 cells, and is about 60 megs when stored on hard drive...what is R doing, that this (small) size of file takes up so much