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wings0201 · wings0201 · commit f3d130df6475 · 2014-07-27T14:45:33.000+08:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -4,12 +4,32 @@
 ## Write a short comment describing this function
 
 makeCacheMatrix <- function(x = matrix()) {
+    inverse <- NULL
+    set <- function(y) {
+        x <<- y
+        inverse <<- NULL
+    }
+    get <- function() x
+    setInverse <- function(inverseMatrix) inverse <<- inverseMatrix
+    getInverse <- function() inverse
+    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'
+    ## 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
 }
