Update cachematrix.R

cachematrix.R

@@ -1,15 +1,34 @@
-## Put comments here that give an overall description of what your
-## functions do
 
-## Write a short comment describing this function
 
-makeCacheMatrix <- function(x = matrix()) {
 
+## This function creates a matrix object that can cache its inverse
+makeCacheMatrix <- function(x = matrix()) {
+  m <- NULL
+  set <- function(y) { # sets the variables x and y
+    x <<- y
+    m <<- NULL
+  }
+  get <- function() x #gets x
+  setInverse <- function(inverse) m <<- inverse #sets the inverse to m
+  getInverse <- function() m #gets m
+  list(set = set, get = get,
+       setInverse = setInverse,
+       getInverse = getInverse)
 }
-
-
-## Write a short comment describing this function
-
+#This function computes the inverse of the matrix, 
+#if it has not been computed before or 
+#retrieves the answer that has been already calculated
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  m <- x$getInverse()#get inverse or NULL if it has not been computed before
+
+  if(!is.null(m)) {# if the inverse has been computed before, return that inverse
+    message("getting cached inverse")
+    return(m)
+  }
+  data <- x$get()
+  m <- solve(data, ...)#compute inverse if it has not been computed before
+  x$setInverse(m)
+  m
 }
+
+