[R] Match numeric vector against rows in a matrix?
kevinummel at gmail.com
Wed Jan 5 20:16:47 CET 2011
Two posts in one day is not a good day...and this question seems like it should have an obvious answer:
I have a matrix where rows are unique combinations of 1's and 0's:
[1,] 0 0
[2,] 1 0
[3,] 0 1
[4,] 1 1
I want a single function that will give the row index containing an exact match with vector x:
The solution needs to be applied many times, so I need something quick -- I was hoping a base function would do it, but I'm drawing a blank.
More information about the R-help