[R] seq(...) strange logical value

Do you heve any idea why I get after this instruction everywhere false? seq (0, 1, by=0.1) == 0.3 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE But after different step it's ok: seq(0, 1, by=0.1) == 0.4 [1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE

Re: [R] seq(...) strange logical value

http://wiki.r-project.org/rwiki/doku.php?id=misc:r_accuracy:decimal_numbers http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f Grześ wrote: Do you heve any idea why I get after this instruction everywhere false? seq (0, 1, by=0.1) == 0.3

Re: [R] seq(...) strange logical value

See http://wiki.r-project.org/rwiki/doku.php?id=misc:r_accuracy:decimal_numbers#sequences_of_decimal_numbers and also http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f Grześ wrote: Do you heve any idea why I get after this instruction

Re: [R] seq(...) strange logical value

Allan Engelhardt wrote: See http://wiki.r-project.org/rwiki/doku.php?id=misc:r_accuracy:decimal_numbers#sequences_of_decimal_numbers as usual, be careful about what is advertised in r docs and related texts. on the r_accuracy page, you'll read: For further information, see the digits

Re: [R] seq(...) strange logical value

How about this: %==% - function(x, y) { if (length(x) 1) { sapply(x, function(z) isTRUE(all.equal(z, y))); } else { sapply(y, function(z) isTRUE(all.equal(z, x))); } } seq(0, 1, by=0.1) %==% 0.1 [1] FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE