On Sep 6, 2012, at 2:45 PM, Shayne Hodge wrote:
> I accidentally posted the wrong version of my code, omitting the Q1 loop,
> and, sure enough that loop generates non-integers:
>
> qfracseq <- seq(from = 1, to = 0, by = -.1)
> Q <- 10
> Qseq <- Q*qfracseq
>
>> Qseq [1] 10.00000000000000000 9.00000000000000000 8.00000000000000000
>> 7.00000000000000000
> [5] 6.00000000000000000 5.00000000000000000 3.99999999999999911
> 2.99999999999999911
> [9] 1.99999999999999956 0.99999999999999978 0.00000000000000000
>
>
> -----
>
> I'm a tad puzzled by why my code would do this; is this a result of some
> base-10 fractions not representing as cleanly in base-2 as in -10?
Read the FAQ. ("Why doesn't R think these numbers are equal?") Can't remember
for sure but suspect someplace around 7.31
snipped
--
David Winsemius, MD
Alameda, CA, USA
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