Re: [R] IF function

Hi, May be this helps.  dat1<- read.table(text=" Col1,Col2 High value,9 Low value,0 High value,7 Low value,0 Low value,0 No data,0 High value,8 No data,0 ",sep=",",header=TRUE,stringsAsFactors=FALSE) dat1$Col2[dat1$Col1=="No data"]<- NA  dat1 #    Col1 Col2 #1 High value    9 #2  Low value   

Re: [R] If function error: missing value where TRUE/FALSE needed

(relativenes[i] < cost) {dispersal[i] <-((relativenes[i]- cost)/(relativenes[i]- cost*cost))} else {dispersal[i] <- 0}} } } > Subject: Re: [R] If function error: missing value where TRUE/FALSE needed > From: petr.pi...@prech

Re: [R] If function error: missing value where TRUE/FALSE needed

which is treated by if as an inappropriate input so there is missing value error. But without data and its structure it is only a guess. Regards Petr > > [R] If function error: missing value where TRUE/FALSE needed > > > Hello! > I am trying to get a logic estatement in

[R] If function error: missing value where TRUE/FALSE needed

Hello! I am trying to get a logic estatement in R using the if function, but it is all the time comming and error, I have tryied different methods but nothing is working the sentence is the following: dispersal[1] <- if (any (relativenes[1] < cost)) ((relativenes[1]- cost)/(relativenes[1]- co

Re: [R] if function problems

Thank you for your adding, Steve, i followed Daivd's suggection and finally got the answer. It is my careless that should put lena instead of lenx. I also tried your codes and worked well. I appreciate your help. I learnt a lot from this forum. Cheers, Zoe -- View this message in context: http:/

Re: [R] if function problems

Hi another possibility is to use logical values properties > (x < 0)*x [1] -3 -2 -1 0 0 0 0 Regards Petr > > In addition to what David said: > > On Mon, Aug 1, 2011 at 6:57 PM, zoe_zhang <1987.zhan...@gmail.com> wrote: > > Dear All, > > Sorry to bother > > I want to write a function in R

Re: [R] if function problems

David, I'm so appreciate! Sincerely, Zoe -- View this message in context: http://r.789695.n4.nabble.com/if-function-problems-tp3710995p3711062.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://s

Re: [R] if function problems

In addition to what David said: On Mon, Aug 1, 2011 at 6:57 PM, zoe_zhang <1987.zhan...@gmail.com> wrote: > Dear All, > Sorry to bother > I want to write a function in R using if > Say I have a dataset x, > if x[i]<0, then x[i]=x[i], > if x[i]>0, then x[i]=0 > > for example, x=-3:3, > then using t

Re: [R] if function problems

On Aug 1, 2011, at 6:57 PM, zoe_zhang wrote: Dear All, Sorry to bother I want to write a function in R using if Say I have a dataset x, if x[i]<0, then x[i]=x[i], if x[i]>0, then x[i]=0 for example, x=-3:3, then using the function, x becomes [-3,-2,-1,0,0,0,0] Just use logical indexing x[ x>

[R] if function problems

Dear All, Sorry to bother I want to write a function in R using if Say I have a dataset x, if x[i]<0, then x[i]=x[i], if x[i]>0, then x[i]=0 for example, x=-3:3, then using the function, x becomes [-3,-2,-1,0,0,0,0] I write the codes as follows, gjr=function(x) {lena=length(x) for(i in 1:lenx)