programming assignment 2

programming assignment 2

Author: simonqiang

cachematrix.R

@@ -3,13 +3,64 @@
 
 ## Write a short comment describing this function
 
-makeCacheMatrix <- function(x = matrix()) {
-
+makeCacheMatrix <- function( m = matrix() ) {
+    
+    ## Initialize the inverse property
+    i <- NULL
+    
+    ## Method to set the matrix
+    set <- function( matrix ) {
+        m <<- matrix
+        i <<- NULL
+    }
+    
+    ## Method the get the matrix
+    get <- function() {
+        ## Return the matrix
+        m
+    }
+    
+    ## Method to set the inverse of the matrix
+    setInverse <- function(inverse) {
+        i <<- inverse
+    }
+    
+    ## Method to get the inverse of the matrix
+    getInverse <- function() {
+        ## Return the inverse property
+        i
+    }
+    
+    ## Return a list of the methods
+    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'
+    m <- x$getInverse()
+    
+    ## Just return the inverse if its already set
+    if( !is.null(m) ) {
+        message("getting cached data")
+        return(m)
+    }
+    
+    ## Get the matrix from our object
+    data <- x$get()
+    
+    ## Calculate the inverse using matrix multiplication
+    m <- solve(data) %*% data
+    
+    ## Set the inverse to the object
+    x$setInverse(m)
+    
+    ## Return the matrix
+    m
 }