How to insert one element into a vector?

michael watson (IAH-C) wrote:

There must be a million ways of doing this!

  Actually I'd say there were no ways of doing this, since I dont
think you can actually insert into a vector - you have to create a
new vector that produces the illusion of insertion!

  Here's a Q+D function that fails if you try and insert at the
start, or at the end. Its very D.

insert <- function(v,e,pos){
   return(c(v[1:(pos-1)],e,v[(pos):length(v)]))
}