Numerical error in R (win32) (PR#8909)
teck.lim at imperial.ac.uk wrote:
Hi
I had observed the following problem in R (also C, Matlab, and Python).
sprintf('%1.2g\n', 3.15)
give 3.1 instead of 3.2 whereas an input of 3.75 gives 3.8.
Java's System.out.printf is ok though.
round(3.75,1)
[1] 3.8
round(3.15,1)
[1] 3.1 Similar outcome with sprintf in R. However, the right answer should be 3.2
This is not a bug. Please read the R FAQ "Why doesn't R think these numbers are equal?" and after that note that *numerically* the following inaqualities are TRUE: (3.2 - 3.15) > 0.05 (3.15 - 3.1) < 0.05 Uwe Ligges
Regards Teckpor [[alternative HTML version deleted]]
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