[R] question about rev

[Petr PIKAL]

Hi

> [R] question about rev
> 
> Hi,all:
> I have a vector,and wanna get the opposite value via rev function.
> 
> 
> > a
> [1] FALSE FALSE  TRUE  TRUE  TRUE
> > 
> > rev(a)
> [1]  TRUE  TRUE  TRUE FALSE FALSE
> > 
> 
> 
> I don't know why the 3rd "TRUE" has not been reversed,while all other 
> values are reversed?

Misunderstanding what rev function does.

see

letters
rev(letters)
!a

Regards
Petr


> 
> 
> 
> 
> Thanks 
> 
> 
> My best
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> 
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