Hi Eliza, On Wed, Nov 14, 2012 at 9:33 AM, eliza botto <eliza_bo...@hotmail.com> wrote: > > dear useRs, > i created a distance matrix, of certain voltage values. unfortunately, i lost > the original values. i am only left with the distance matrix that i created > from those values. i wanted to ask that is there a way in R to reverse > distance matrix for the original values?
There is not, and a bit of thought will tell you why. Say you used Euclidean distance as your metric, and only had one variable. For a distance of 2, the original data could be: dist(c(10, 12)) dist(c(5, 7)) dist(c(7, 5)) dist(c(1, 3)) dist(c(100000, 100002)) dist(c(2, 4)) dist(c(2.1, 4.1)) dist(c(2.2, 4.2)) and so on. Even with known bounds on your voltage values, there are an infinite number of equivalent solutions. I suppose you could try to treat it as a system of X equations and X unknowns and find possible solutions, but that doesn't get you back your original data. Sarah -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
