cachematrix.R

## Create a version of matrix with support for caching its inverse
## and a function that uses that in getting the matrix inverse

## Create a wrapper for matrix that supports caching the inverse i

makeCacheMatrix <- function(x = matrix()) {
  i <- NULL
  set <- function(y) {
    x <<- y
    i <<- NULL
  }
  get <- function() x
  setinverse <- function(inv) i <<- inv
  getinverse <- function() i
  list(set = set, get = get,
       setinverse = setinverse,
       getinverse = getinverse)
}


## Return the cached inverse of x if available
## otherwise generate, cache, and return the inverse

cacheSolve <- function(x, ...) {
  i <- x$getinverse()
  if(!is.null(i)) {
    message("getting cached data")
    return(i)
  }
  data <- x$get()
  i <- solve(data, ...)
  x$setinverse(i)
  i
}