Hope this is clear:
> x <- seq(0.1, 1, by=0.1)
> 0.3 == x[3]
[1] FALSE> abs(0.3 - x[3])
[1] 5.551115e-17
Andy
From: Jacques VESLOT>
> sorry if it has already been discussed but i can't understand this:
>
> > seq(0.1,1,by=0.1)
> [1] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
> > match(0.1,seq(0.1,1,by=0.1))
> [1] 1
> > match(0.2,seq(0.1,1,by=0.1))
> [1] 2
> > match(0.3,seq(0.1,1,by=0.1))
> [1] NA
> > match(0.4,seq(0.1,1,by=0.1))
> [1] 4
>
> > R.version
> _
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 2.1
> year 2005
> month 12
> day 20
> svn rev 36812
> language R
>
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