cachematrix.R

## Put comments here that give an overall description of what your
## functions do

## These functions invert a matrix and return the inverse values
## If an inverse has already been calculated it is stored in and returned from the cache
makeCacheMatrix <- function(x = matrix()) {
        m <- NULL
        set <- function(y) {
                x <<- y
                m <<- NULL
        }
        get <- function() x
        setinverse <- function(inverse) m <<- inverse
        getinverse <- function() m
        list(set = set, get = get,
             setinverse = setinverse,
             getinverse = getinverse)
}


## computes the inverse of the special "matrix" returned by 
## makeCacheMatrix above. If the inverse has already been calculated 
## and the matrix has not changed), then the cachesolve should retrieve 
## the inverse from the cache.
cacheSolve <- function(x, ...) {
        ## Return a matrix that is the inverse of 'x'
        ## Determine if inverse is already available in cache
        ## If so: return from cache; otherwise calculate inverse and return value
        m <- x$getinverse()
        if (!is.null(m)) {
                message("getting cached data")
                return(m)
        }
        mat <- x$get()
        m <- solve(mat, ...)
        x$setinverse(m)
        m
}