This function implements a way of caching the result of the inverse matrix of a given matrix.

RmakeCacheMatrix

## This function implements a way of caching the result of the inverse matrix of a given matrix.

## makeCacheMatrix creates a special matrix from an initial matrix can can hold
## any additional information, wich can be used to store its inverse.
## Implementation of sub functions to set and set both objects.

makeCacheMatrix <- function(x = matrix()) {
    m <- NULL
    set <- function(y) {
        x <<- y
        m <<- NULL
    }
    get <- function() x
    setinv <- function(inv) m <<- inv
    getinv <- function() m
    list(set = set, get = get,
         setinv = setinv,
         getinv = getinv)
}


## CacheSolve acts on a special "matrix" (x) to retreive its inverse, either using 
## pre-existing stored value, or by calculating it, and caching it on the 
## provided matrix (x).

cacheSolve <- function(x, ...) {
        ## Return a matrix that is the inverse of 'x'
    m <- x$getinv()
    if(!is.null(m)) {
        message("getting cached data")
        return(m)
    }
    data <- x$get()
    m <- solve(data)
    x$setinv(m)
    m
}