Update cachematrix.R

mingcho · mingcho · commit 998ffb5a8fc5 · 2014-04-16T19:12:42.000-07:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -4,12 +4,32 @@
 ## Write a short comment describing this function
 
 makeCacheMatrix <- function(x = matrix()) {
-
+	m <- NULL
+        set <- function(y) {
+		x <<- y
+		m <<- NULL
+	}
+	get <- function() x
+	setinverse <- function(solve) m <<- solve
+	getinverse <- function() m
+	list(set = set, get = get,
+		setinverse = setinverse,
+		getinverse = getinverse)
 }
 
 
 ## Write a short comment describing this function
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
+        m <- x$getinverse()
+	if(!is.null(m)) {
+		message("getting cached data")
+		return(m)
+	}
+	# Solve and cache matrix inverse for new matrix
+	data <- x$get()
+	m <- solve(data, ...)
+	x$setinverse(m)
+	m
 }
