[R] problem with sum function

Mark A. Albins kamokoi55 at gmail.com
Thu Mar 1 22:49:44 CET 2012


I'm running R version 2.13.0 (2011-04-13)
Platform: i386-pc-mingw32/i386 (32-bit)

When i type in the command:

sum(c(-0.2, 0.8, 0.8, -3.2, 1.8))

R returns the value:


Why doesn't R return zero in this case?  There shouldn't be any rounding 
error in a simple sum.



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