I am using R Version 2.6.2007-11-23. I do not know if the problem exists
for other values or versions
I encountered a problem when searching for the number 0.94 and 0.95 in a
vector of values. I illustrate it below by creating a sequence of values 2
ways and then looking for the value 0.94 (same result for 0.95). It looks
like the vector generated by seq( ) is a bit off:
> a<-seq(.9,.95,by=.01)
> a
[1] 0.90 0.91 0.92 0.93 0.94 0.95
> b<-c(.90,.91,.92,.93,.94,.95)
> b
[1] 0.90 0.91 0.92 0.93 0.94 0.95
> a==.94
[1] FALSE FALSE FALSE FALSE FALSE FALSE
> b==.94
[1] FALSE FALSE FALSE FALSE TRUE FALSE
> a-b
[1] 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.110223e-16
[6] 1.110223e-16
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