First submission of the assignment

Author: xande

cachematrix.R

@@ -1,15 +1,46 @@
-## Put comments here that give an overall description of what your
-## functions do
+## A set of functions to create object to cache matrix inversion and to compute matrix inversion
+## makeCacheMatrix - creates special "matrix" pbject
+## cacheSolve - calculates inversion of th eobject created by makeCacheMatrix. 
+##              This function will also cache the result and returns cached calculations
+##              if the inverse has already been calculated (and the matrix has not changed)
 
-## Write a short comment describing this function
+# makeCacheMatrix creates a special "vector", which is really a list containing a function to
+# set the value of the matric
+# get the value of the matrix
+# set the value of the inverted matrix
+# get the value of the inverted matrix
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  inverse <- NULL
+  set <- function(y) {
+    x <<- y
+    inverse <<- NULL
+  }
+  
+  get <- function() x
+  
+  setinverse <- function(i) inverse <<- i
+  getinverse <- function() inverse
+  
+  list(set = set, get = get, setinverse = setinverse, getinverse = getinverse)
 }
 
 
-## Write a short comment describing this function
+# cacheSolve receive a special "cacheMatrix" object, and then returns 
+# cached inverted matrix if it was cached or comuputes new one, caches it and returns the result
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  inverse <- x$getinverse()
+  if(!is.null(inverse)) {
+    message("getting cached data")
+    return(inverse)
+  }
+  
+  matrix <- x$get()
+  inverse <- solve(matrix)
+  x$setinverse(inverse)
+  inverse
 }
+
+
+