Computational differences in R vs Excel

 For example, i am performing this simple arithmetic:
    23-(1.346493052*16)+(.663965156*11)+(.008569426*5)-15.23480728

R gives the result --> -6.432232271

My machine (win32, R 3.0.1) gives -6.432232266

Something about your machine, or typing, is different.

It shouldn't be R, as the help system implies it uses the same precision and IEEE floating point rules for all platforms....


S Ellison



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