Re: [R] Surprising behavior using seq()

Patrick and Bert, Thank you both for you replies to my question. I see how my naïve expectations fail to floating point arithmetic. However, I still believe there is an underlying problem. It seems to me that when asked, c(7.7, 7.8, 7.9) %in% seq(4, 8, by=0.1) [1] TRUE FALSE TRUE R

[R] Surprising behavior using seq()

Hello R-help, I noticed the following surprising behavior when using %in% to find elements in a vector generated using seq(). # weird!!! c(7.7, 7.8, 7.9) %in% seq(4, 8, by=0.1) [1] TRUE FALSE TRUE # OK now c(7.7, 7.8, 7.9) %in% round(seq(4, 8, by=0.1), 1) [1] TRUE TRUE TRUE # wait, how