[R] how to save this result in a vector

[Joshua Wiley]

On Sun, Oct 31, 2010 at 5:44 PM, Joshua Wiley <jwiley.psych at gmail.com> wrote:
<snip>
> #cover is a vector
> cover_per <- function(cover) {
>  ## create a vector to store the results of your for loop
>  output <- vector("numeric", length(min(cover):max(cover)))
>  for (i in min(cover):max(cover)) {
>    ## rather than print()ing the output, assign it to an object
>    output[i] <- 100*sum(ifelse(cover >= i, 1, 0))/length(cover)
>  }
>  ## have the return value from the function be
>  ## the object 'output'
>  return(output)
> }

I did not catch that i was not necessarily starting at 1 going
sequentially up, so that would have to be done manually (or use cumsum
per David rather than the function you wrote).

cover_per2 <- function(cover) {
  output <- vector("numeric", length(min(cover):max(cover)))
  j <- 1
  for (i in min(cover):max(cover)) {
    output[j] <- 100*sum(ifelse(cover >= i, 1, 0))/length(cover)
    j <- j + 1
  }
  return(output)
}

Josh