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Does mathematica support MDS? Or, are there any libraries that support it?

Basically, I have points and a distance function defined between them, and I want to plot them in 2D space, trying to minimize the error (stress) in the distance. This is what MDS does. R has support for MDS, but I can't find similar methods in Mathematica, which I think is strange because this seems like a really common thing to want to do...

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To my knowledge, there's no built-in functionality for this. Google revealed a package to do this, but I have not used it myself. –  Szabolcs Jun 17 '12 at 15:17
    
Thanks, I think this is the answer to the question. –  Jose M Vidal Jun 17 '12 at 20:47
    
Did you try the package? Does it work correctly with version 8? –  Szabolcs Jun 18 '12 at 9:52
    
@Sz Graph embedding in two dimensions is actually MDS in disguise. –  whuber Jun 18 '12 at 20:11
    
Thanks! I didn't know about that. But, there does not seem to be a way to change the edge length (is there?). In my graph some edges would be much longer than others. –  Jose M Vidal Jun 18 '12 at 23:06

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You might be able to adapt the code in the Multidimensional Scaling demonstration in the Wolfram Demonstrations project.

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I saw that but, I'm not sure that it works. I tried distances2points[{{0, 1, 1}, {1, 0, 1}, {1, 1, 0}}] and the resulting points do not form an equilateral triangle, as I was expecting. –  Jose M Vidal Jun 17 '12 at 17:54

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