Update cachematrix.R

cachematrix.R

@@ -4,12 +4,39 @@
 ## Write a short comment describing this function
 
 makeCacheMatrix <- function(x = matrix()) {
-
+    inv <- NULL
+
+    set <- function(y) {
+        x <<- y
+        inv <<- NULL  # Clear cached inverse when new matrix is set
+    }
+
+    get <- function() x
+
+    setinverse <- function(inverse) inv <<- inverse
+
+    getinverse <- function() inv
+
+    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'
+    inv <- x$getinverse()
+
+    if(!is.null(inv)) {
+        message("getting cached inverse")
+        return(inv)
+    }
+
+    mat <- x$get()
+    inv <- solve(mat, ...)
+    x$setinverse(inv)
+    inv
 }