Re: [R] Data corruption with big numbers.

2013-08-09 Thread Adams, Jean
The link to FAQ 7.31 is http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f Jean On Fri, Aug 9, 2013 at 8:16 AM, jim holtman wrote: > FAQ 7.31 is a start. > > Understand the "precision" of floating point numbers. You probably only > have about 15

Re: [R] Data corruption with big numbers.

2013-08-09 Thread jim holtman
FAQ 7.31 is a start. Understand the "precision" of floating point numbers. You probably only have about 15 digits (54 bits) of significance. If you need unlimited number of digits, there are some other alternatives. On Fri, Aug 9, 2013 at 5:54 AM, Johan Nyberg wrote: > I am confused about w

[R] Data corruption with big numbers.

2013-08-09 Thread Johan Nyberg
I am confused about what I believed was artefects from reading .csv files with big numbers. Finally I checked using the console and this is what I get, the same as when importing: > >longnumber<-63502481056038 >longnumber [1] 635024810560380032 I have tried setting "options(digits=22) and al