week_03_assignment.R

###' Week 03 assignment
###' 
###' Function to create a special "matrix" object that can cache its inverse.
###' 
makeCacheMatrix <- function(x = matrix()) {
  inverse <- NULL                           
  set <- function(y) {                     
    x <<- y                             
    inverse <<- NULL                        
  }
  get <- function() x                     
  
  setinverse <- function(inverse) inverse <<- inverse  
  getinverse <- function() inverse                    
  list(set = set, get = get, setinverse = setinverse, getinverse = getinverse)
  
}

###' Function to compute the inverse of the special "matrix" returned by makeCacheMatrix
###' above. If the inverse has already been calculated (and the matrix has not changed),
###' then the cachesolve should retrieve the inverse from the cache.

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