From 137d515604399d6c1a80e15737e59deb4406c342 Mon Sep 17 00:00:00 2001
From: Sean Ferenci <sferenci1@yahoo.com>
Date: Sun, 20 Apr 2014 11:55:20 -0400
Subject: [PATCH 1/2] Assignment Complete

---
 cachematrix.R | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..b2bb2c8c8aa 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -4,7 +4,17 @@
 ## Write a short comment describing this function
 
 makeCacheMatrix <- function(x = matrix()) {
-
+        i <- NULL
+        set <- function(y) {
+                x <<- y
+                i <<- NULL
+        }
+        get <- function() x
+        setinverse <- function(solved) i <<- solved
+        getinverse <- function() i
+        list(set = set, get = get,
+             setinverse = setinverse,
+             getinverse = getinverse)
 }
 
 
@@ -12,4 +22,13 @@ makeCacheMatrix <- function(x = matrix()) {
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
+        i <- x$getinverse()
+        if(!is.null(i)) {
+                message("getting cached data")
+                return(i)
+        }
+        data <- x$get()
+        i <- solve(data, ...)
+        x$setinverse(i)
+        i
 }

From 1c8925bf88c249c4cee5fd705005592df704a672 Mon Sep 17 00:00:00 2001
From: Sean Ferenci <sferenci1@yahoo.com>
Date: Sun, 20 Apr 2014 12:02:58 -0400
Subject: [PATCH 2/2] Added comments

---
 cachematrix.R | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index b2bb2c8c8aa..c356975ef7d 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,7 +1,11 @@
-## Put comments here that give an overall description of what your
-## functions do
+## Written by Sean Ferenci, P.Eng.
+## April 20, 2014
 
-## Write a short comment describing this function
+## makeCacheMatrix creates a special "Matrix", which is really a list containing a function to
+## set the value of the matrix
+## get the value of the matrix
+## set the value of the inverse matrix
+## get the value of the inverse matrix
 
 makeCacheMatrix <- function(x = matrix()) {
         i <- NULL
@@ -18,7 +22,9 @@ makeCacheMatrix <- function(x = matrix()) {
 }
 
 
-## Write a short comment describing this function
+## This function computes 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, ...) {
         ## Return a matrix that is the inverse of 'x'