cachematrix.R

##The following two functions are used to calculate the inverse of a matrix, 
##if the matrix has been cached before, the inverse of a matrix will be returned 
##from cache

## This is a special function that creates special matrix include set value of matrix, get value of matrix 
##set the inverse of matrix and get the inverse of matrix

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)
}




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