[R] 2D look up (within interval)
yasir.kaheil at ec.gc.ca
Thu Apr 29 19:58:21 CEST 2010
I have a matrix of X and Y coordinates, and one pair of coordinates that I
need to know it corresponds (or is closest) to which row in the matrix. For
I know that if you do which.min you'll get the answer, which will be row #
542440, but which.min is slow and this process needs to be repeated a lot.
I tried using match and findInterval and %in% but I don't know how I can use
them to find in 2 columns simultanuously.
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