From ebb7acb5c290ada278ac9f13b541258fff394a44 Mon Sep 17 00:00:00 2001
From: triharder <travis.wethington@gmail.com>
Date: Tue, 22 Apr 2014 21:25:38 +0000
Subject: [PATCH 1/4] Update cachematrix.R

---
 cachematrix.R | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..4d47999b160 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,15 +1,25 @@
-## Put comments here that give an overall description of what your
-## functions do
+## This second programming assignment will require you to write an R function is able to cache
+## potentially time-consuming computations. For example, taking the mean of a numeric vector is
+## typically a fast operation. However, for a very long vector, it may take too long to compute 
+## the mean, especially if it has to be computed repeatedly (e.g. in a loop). If the contents of 
+## a vector are not changing, it may make sense to cache the value of the mean so that when we 
+## need it again, it can be looked up in the cache rather than recomputed. In this Programming 
+## Assignment will take advantage of the scoping rules of the R language and how they can be 
+## manipulated to preserve state inside of an R object.
 
-## Write a short comment describing this function
+## This function creates a special "matrix" object that can cache its inverse.
 
 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'
+        
+        return solve(x)
 }

From 360ea402d23f8bdae7fb5cde3a44aed453ae1822 Mon Sep 17 00:00:00 2001
From: triharder <travis.wethington@gmail.com>
Date: Wed, 23 Apr 2014 02:06:53 +0000
Subject: [PATCH 2/4] Update cachematrix.R

---
 cachematrix.R | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index 4d47999b160..4a277c8b44a 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -10,7 +10,17 @@
 ## This function creates a special "matrix" object that can cache its inverse.
 
 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)
 }
 
 
@@ -20,6 +30,13 @@ makeCacheMatrix <- function(x = matrix()) {
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
-        
-        return solve(x)
+        m <- getInverse()
+        if(!is.null(m)){
+                message("Checking cache..."
+                return(m)
+        }
+        data <- x$get()
+        m <- solve(data,...)
+        x$setInverse(m)
+        m
 }

From 420a994f0b002fca1f8eedb9404c9d0daa6c482f Mon Sep 17 00:00:00 2001
From: triharder <travis.wethington@gmail.com>
Date: Wed, 23 Apr 2014 21:58:27 +0000
Subject: [PATCH 3/4] Update cachematrix.R

---
 cachematrix.R | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cachematrix.R b/cachematrix.R
index 4a277c8b44a..945b0893787 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -36,7 +36,7 @@ cacheSolve <- function(x, ...) {
                 return(m)
         }
         data <- x$get()
-        m <- solve(data,...)
+        m <- solve(data)
         x$setInverse(m)
         m
 }

From b8fe311451469d5c46c788dce0a7149f41de610b Mon Sep 17 00:00:00 2001
From: triharder <travis.wethington@gmail.com>
Date: Sat, 22 Aug 2015 22:30:18 -0400
Subject: [PATCH 4/4] Update cachematrix.R

---
 cachematrix.R | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cachematrix.R b/cachematrix.R
index 945b0893787..00df4c3b87f 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -32,7 +32,7 @@ cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
         m <- getInverse()
         if(!is.null(m)){
-                message("Checking cache..."
+                message("Checking cache...")
                 return(m)
         }
         data <- x$get()