Cachematrix.R

cachematrix.R

@@ -1,15 +1,31 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## This function creates a special matrix object that can store a matrix ans its cached inverse
 
 makeCacheMatrix <- function(x = matrix()) {
-
+    m <- NULL
+    set <- function(y){
+        x <<- y
+        m <<- NULL #Reset the inverse when the matrix changes
+    }
+    get <- function() x
+    setsolve <- function(solve) m <<- solve
+    getsolve <- function() m
+    list(set =set, get=get, 
+         setsolve=setsolve, 
+         getsolve=getsolve)
 }
 
 
-## Write a short comment describing this function
+## Computes the inverse of the special matrix object
 
-cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
-}
+cacheSolve <- function(x, ...) { #first checks if it has been already calculated
+    m <- x$getsolve()
+    if(!is.null(m)) {
+        message("getting cached data") #if it has been calculated return the cached value
+        return(m)
+    }
+    data <- x$get() #if it has not been calculated it makes the calculation
+    m <-solve (data, ...)
+    x$setsolve(m)
+    m
+    }
+    ## Return a matrix that is the inverse of 'x'