[R] equating approximate values

vamshi999 vamshi999 at gmail.com
Sun Dec 4 19:00:40 CET 2011

Hello List, 

I am having trouble finding the command for my problem. 

I have two arrays x and y. now i would like to compare the values of x and y
and then get the index of x which is exactly or approximately equal(+/- some
value ) to the values in y.
 x <- runif(100,min=0,max=5)
 y <- runif(10,min=0,max=5)

the threshold value(+/-) value can vary. for this example lets take it to be

I know the regular method of doing this by writing different if and for
loops. But i have very big dataframe the computation time is very high for
this method. can anyone please tell me if there any functions to do this. 

thank you for your help. 

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