On Fri, 2008-11-07 at 15:53 +0530, Shubha Vishwanath Karanth wrote: > > Hi R, > > > > I have certain checkings, which gives FALSE, but actually it is true. Why > does this happen? Note that the equations that I am checking below are not > even the case of recurring decimals... > > > > > 1.4^2 == 1.96 > > [1] FALSE > > > > > 1.2^3==1.728 > > [1] FALSE
Shubha the correct answer for us is TRUE for the computer is FALSE 1.4^2-1.96 [1] -2.220446e-16 1.2^3-1.728 [1] -2.220446e-16 but if you use "all.equal" all.equal(1.4^2,1.96) [1] TRUE all.equal(1.2^3,1.728) [1] TRUE More details in R FAQ 7.31 -- []s Tura ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
