Completed Assignment 2

Author: aristidescc

cachematrix.R

@@ -1,15 +1,38 @@
-## Put comments here that give an overall description of what your
-## functions do
+## Functions for caching inverse matrix calculation. This is solved with one 
+## generator function which uses lexical scoping rules to store a cache for 
+## inverse matrix. Before solving inverse matrix calculation, cache variable is 
+## previously checked and if cache is different than NULL, cached value is 
+## returned.
 
-## Write a short comment describing this function
+## Generator function for managing matrix values and inverse matrix cache.
 
 makeCacheMatrix <- function(x = matrix()) {
-
+    inv <- NULL
+    set <- function(y) {
+        x <<- y
+        inv <<- NULL
+    }
+    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
+## Function to solve inverse matrix calculation, while making use of caching
+## features provided by generator function.
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+    ## Return a matrix that is the inverse of 'x'
+    inv <- x$getinverse()
+    if(!is.null(inv)) {
+        message("getting cached result")
+        return(inv)
+    }
+    data <- x$get()
+    inv <- solve(data, ...)
+    x$setinverse(inv)
+    inv    
 }