R minimal calculation error
On Aug 24, 2012, at 5:48 AM, Frederik Bertling <Frederik.Bertling at stud.uni-due.de> wrote:
Hi, I'm doing some easy calculations to normalize some values. This looks like this: x=mean(a+b+c+d ...) a=a-x b=b-x c=c-x d=d-x ... mean(a+b+c+d ...) ---> Should now be 0! However, I'm getting results like -2.315223e-18 This is really near to 0 but not very aesthetic. Can I prevent this? Or is this behaviour desired? Thank you very much! Burtan
Read this: http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f Regards, Marc Schwartz