Hi, mohamed nur anisah wrote: > Dear lists, > > any suggestion on how to write a function to return a TRUE if interval > [a,b] overlaps the interval [c,d]. I've tried it but an error occur saying > that 'could not find function v ; in addition warning message occur'. Below > is my codes.Please help me sort this problem as i'm in process of learning of > writing a function. Many thanks
does this do what you want? overlap <- function(a,b,c,d) { all(c:d %in% a:b) } overlap(1,5,3,4) overlap(1,2,3,4) Best, Roland > > overlap<-function(m,n){ > t=length(m) > v=length(n) > tt=logical(t) > tv=logical(v) > for(i in 1:m){ > for(i in 1:n){ > if(v(i,j)<=t(i,j)){ > tt=T > tv=T > } > } > } > k=c(tt,tv) > return(k) > } > > Regards, > Anisah > > > --------------------------------- > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.