Hi,
I am trying to compare two values using "==" operand, please take a look of the
following example (I copied ALL what I did here without deleting any line)
> bb<-1
> cc<-50
> cc==abs(bb+52)
[1] FALSE
> C<-53
> C<-53
> c<-53
> cc==abs(bb+52)
[1] FALSE
I am expecting to see a TRUE here. Then I tried another way,
> abs(1+52)
[1] 53
> cc==abs(1+52)
[1] FALSE
Why it is FALSE. Then I tried
> d<-abs(b+52)
Error: object "b" not found
> d<-abs(bb+52)
> d
[1] 53
> c==d
[1] TRUE
Now it is TRUE, but a wired thing is as following,
> c==abs(bb+52)
[1] TRUE
The coding "c==abs(bb+52)" is just the same from the 3line in the top, why 2
different results? HOWEVER, it is not repeatable, I am glad I did not close the
window.
Also,
> c<-0.5-0.1
> n<-0.6-0.2
> n==c
[1] FALSE
So, is "==" comparing formula or result?
Thanks,
Renny
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