Complete the makeCacheMatrix and cacheSolve methods

Author: codyaray

cachematrix.R

@@ -1,15 +1,35 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## Computes and caches the inverse of a square matrix.
+##
+## Two methods are exposed:
+##   makeCacheMatrix creates or wraps a matrix to cache its inverse
+##   cacheSolve returns the cached inverse if available, or computes and caches it otherwise.
 
+## Creates or wraps a matrix to cache its inverse
 makeCacheMatrix <- function(x = matrix()) {
-
+        i <- NULL
+        set <- function(y) {
+                x <<- y
+                i <<- NULL
+        }
+        get <- function() x
+        setinverse <- function(inverse) i <<- inverse
+        getinverse <- function() i
+        list(set = set, get = get,
+             setinverse = setinverse,
+             getinverse = getinverse)
 }
 
 
-## Write a short comment describing this function
-
+## Returns the cached inverse if available, or computes and caches it otherwise.
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
-}
+        inverse <- x$getinverse()
+        if(!is.null(inverse)) {
+                message("getting cached data")
+                return(inverse)
+        }
+        data <- x$get()
+        inverse <- solve(data, ...)
+        x$setinverse(inverse)
+        inverse
+}