[R] erratic behavior of match()?

Bernhard Klingenberg Bernhard.Klingenberg at williams.edu
Thu Apr 19 03:02:15 CEST 2007

Consider the code:

x <- seq(0,1,0.2)
y <- seq(0,1,0.01)

which, surprisingly, doesn't show a match at 0.6! (It gives correct 
matches at 0, 0.2, 0.4, 0.8 and 1, though)

In addition,


yields FALSE. (but x[5]==y[81], the one for 0.8,  yields TRUE)

Is this a consequence of machine error or something else?
Could this be overcome? (It works correctly when integers are used in 
the sequences as well as in many other circumstances)

Thank you,


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