Dear R users,
I have a surprising problem while selecting values in a sequence created
with the seq() function...
I've tried a lot of test before sending this here and hope I did not
disturb you for a foolish mistake from me
Please, have a look at the following lines:
#_______________________________________________________________________
> test2<-seq(from=0,to=1,by=.1)
> test2
[1] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
> test2==1
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE
> test2==0.9
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE
> test2==0.8
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE
> test2==0.7
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.6
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.5
[1] FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE
> test2==0.4
[1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.3
[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.2
[1] FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.1
[1] FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> test2==0.0
[1] TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
>
# there is a problem with values 0.3, 0.6 and 0.7 impossible to select
in such a vector...
# the same thing happens with other sequence including somme of these values
test3<-seq(from=0,to=1,by=0.01)
test3
test3==0.3 # not working
test3==0.6 # working
test3==0.7 # not working
#________________________________________________________________________
Does anyones has an explanation and a solution ?
Kind regards
Ben
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