[R] numeric not equal its value

[Jannis]

Dear R users,



I ran into the strange situation where a number does not seem to equal 
its value. Try this:



a <- seq(0.05,0.7,0.05)[3]

b <- 0.15

a == b


Should this not be TRUE? a-b yields a very small number (and not 0) so 
this most probably is a numerical error, but why does seq create such 
numbers?


Thanks a lot
Jannis