Re: [R] question about rev

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

Re: [R] question about rev

Yes£¬I find out later. rev is only reverse the order. What I use is ! Thanks At 2012-01-06 16:07:11,Petr PIKAL petr.pi...@precheza.cz wrote: 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

Re: [R] question about rev

the function /rev / REVERSEs the order of the vector, as v= c(1,2,3) rev(v)= 3,2,1 if you want the opposite value , just add a exclamation in front of the vector: v=c(T,F,T,T); !v is F,T,F,F -- View this message in context: http://r.789695.n4.nabble.com/question-about-rev-tp4268518p4268716.html

[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? Thanks My best [[alternative