cachematrix.R

## This pair of functions potentially save time
## by caching the value of a matrix inverse

## Creates a special "matrix" object that can cache its inverse

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


## Computes the inverse of the special "matrix" object

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