cachematrix.R

## asouza: Creates a matrix that can cache its inverse. Calculates its inverse only if not already cached.

## Creates a matrix that can cache its inverse
makeCacheMatrix <- function(x = matrix()) {
        inverse <- NULL
        set <- function(y) {
                x <<- y
                inverse <<- NULL
        }
        get <- function() x
        setinverse <- function(inv) inverse <<- inv
        getinverse <- function() inverse
        list(set = set, get = get, setinverse = setinverse, getinverse = getinverse)
}


## Calculates the inverse of a matrix

cacheSolve <- function(x, ...) {
        inv <- x$getinverse()
        if (!is.null(inv)) {
                message("getting cached data")
                return(inv)
        }
        data <- x$get()
        inv <- solve(data, ...)
        x$setinverse(inv)
        inv
}