From a6060d79182f24384e9ff2bbee6ea0557d7f3c34 Mon Sep 17 00:00:00 2001
From: Chris Holliday <chris@chollida.com>
Date: Tue, 21 Oct 2014 22:41:55 -0400
Subject: [PATCH] first commit for caching

---
 cachematrix.R | 37 +++++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..1f861192994 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,15 +1,36 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## Methods to cache the inverse of a matrix and to obtain the cached version of
+## said matrix
 
+## on first call to obtain the matrix inverse, cache the inverse so all 
+## subsequent calls just return a copy
 makeCacheMatrix <- function(x = matrix()) {
-
+  cached_inverse <- NULL
+  set <- function(y) {
+    x <<- y
+    cached_inverse <<- NULL
+  }
+  
+  get <- function() { x }
+  setinverse <- function(inverse) { cached_inverse <<- inverse }
+  getinverse <- function() { cached_inverse }
+  list(set=set, get=get, setinverse=setinverse, getinverse=getinverse)
 }
 
 
-## Write a short comment describing this function
 
+## method to return the inverse of a matrix, while ensureing that we cache
+## the result
 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
+}
\ No newline at end of file