On Dec 5, 2011, at 8:02 AM, R. Michael Weylandt wrote:

Change which to which.min, but then you won't easily be able to get the corresponding x,y indices. Look at the arrayInd() function to translate the result to a particular x,y.

The arrayInd help page is shared by the which help and which has an arr.ind=TRUE option that let's you encapsulate both steps:

which( abs(outer(x, y, "-")) == min(abs(outer(x, y, "-"))), arr.ind=TRUE)


Michael

On Dec 4, 2011, at 7:04 PM, vamshi999 <vamshi...@gmail.com> wrote:

this is exactly what i wanted.

How to i select only the minimum value from this?.

thank you




My apologies: you need an abs() call as well:

which(abs(outer(x, y, "-")) < threshold, arr.ind = TRUE)

Michael




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