Missing last sequence in seq() in R

Question

I have this example data

by<-200
to<-seq(from=by,to=35280,by=by)

Problem is that to ends at 35200 and ignore the last 80 which I need to involve in as last value. Is there any straigthforward way how to achieve it? I have tried along.with and length.out parameters but I cannot go trough.

Answer 1

You can place if statement for the last element of the vector such as in the following function :

seqlast <- function (from, to, by) 
{
  vec <- do.call(what = seq, args = list(from, to, by))
  if ( tail(vec, 1) != to ) {
    return(c(vec, to))
  } else {
    return(vec)
  }
}

Then

by <- 200
to <- seqlast(from=by,to=35280,by=by)

will return

> head(to)
[1]  200  400  600  800 1000 1200
> tail(to)
[1] 34400 34600 34800 35000 35200 35280