From c68e61a538031ceeffa1b587a210baeb23d53a0b Mon Sep 17 00:00:00 2001
From: statsmith <dave@statsmith.com>
Date: Fri, 25 Apr 2014 17:18:33 -0400
Subject: [PATCH] Initial Commit to Programming 2 Assignment

---
 cachematrix.R | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..73cca1567bb 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,15 +1,42 @@
-## Put comments here that give an overall description of what your
-## functions do
+## These functions used in conjunction with each other can 
+## be used to save processing time.  Instead of repeatedly 
+## calculating the inverse of a matrix, it is stored in a 
+## retrievable cache.  The cache changes only if the matrix 
+## called changes...
 
-## Write a short comment describing this function
-
-makeCacheMatrix <- function(x = matrix()) {
+## The makeCacheMatrix function is a constructor function
+## that creates functions to set and get the matrix and 
+## the inverse of the matrix...
 
+makeCacheMatrix <- function(x = matrix())  {
+  m <- NULL
+  set <- function(y) {
+    x <<- y
+    m <<- NULL
+  }
+  get <- function() x
+  setinverse <- function(inverse) m <<- inverse
+  getinverse <- function() m
+  list(set = set, get = get,
+       setInverse = setinverse,
+       getInverse = getinverse)
 }
 
-
-## Write a short comment describing this function
+## The cacheSolve function calls the functions created in the makeCacheMatrix to 
+## either retrieve or save the inverse of a matrix.  If the matrix has not changed 
+## and the inverse has already been calculated, it retrieves the matrix inverse from
+## the cache.  Otherwise, it calculates the matrix inverse and stores it in the cache.
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
+  m <- x$getInverse()
+  if(!is.null(m)) {
+    message("getting cached data")
+    return(m)
+  }
+  data <- x$get()
+  m <- solve(data)
+  x$setInverse(m)
+  m
 }
+