cachematrix.R

## MakeCacheMatrix contains list of function over the matrix
## cacheSolve fetches inverse if already computed and if it's not 
## computes the inverse and stores the result. 

## makeCacheMatrix contains the get,set, getinverse and setinverse functions. 

makeCacheMatrix <- function(x = matrix()) {
        i <- NULL
        set <- function(y) {
                x <<- y
                i <<- NULL
        }
        get <- function() x
        setinverse <- function(inverse) i <<- inverse
        getinverse <- function() i
        list(set = set, get = get,
             setinverse = setinverse,
             getinverse = getinverse)
}


## cacheSolve fetches the stored value of matrix inverse, if exists, 
## else computes and stores it.

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