Functions to add the ability to cache the inverse of a Matrix

sheroy · sheroy · commit 19f55639a38d · 2014-06-21T15:14:43.000-07:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,15 +1,30 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## Set of functions to add the ability to cache the inverse of the Matrix and to 
+## use the cached value while getting the inverse of a Matrix
 
+## Adds the ability to cache the inverse of the matrix passed in as a paramter to this## function
 makeCacheMatrix <- function(x = matrix()) {
-
+    inverse <- NULL
+    set <- function(y) {
+        x <<- y
+        inverse <<- NULL
+    }
+    get <- function() x
+    setinverse <- function(i) inverse <<- i
+    getinverse <- function() inverse
+    list(get = get, set = set, getinverse = getinverse, setinverse = setinverse)
 }
 
 
-## Write a short comment describing this function
-
+## Gets the inverse of the Matrix and caches the result if required.
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+    ## Return a matrix that is the inverse of 'x'
+    i <- x$getinverse()
+    if (! is.null(i)) {
+        message("Getting cached inverse")
+        return(i)
+    }
+    m <- x$get()
+    i <- solve(m, ...)
+    x$setinverse(i)
+    i
 }
