cachematrix.R

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

## Set a specialized object for storing a matrix and some functions

makeCacheMatrix <- function(x = matrix()) {
  ## initialize inverse matrix
  inverse <- NULL
  ## set matrix
  set <- function(y) {
    x <<- y
    inverse <<- NULL
  }
  ## get matrix 
  get <- function() x
  ## set inverse matrix
  setinverse <- function(i) inverse <<- i
  ## get innverse matrix
  getinverse <- function() inverse
  ## put functions to list object
  list(set = set, get = get,
       setinverse = setinverse,
       getinverse = getinverse)
}

## Look for and return inverse matrix if already exists or compute and store inverse matrix

cacheSolve <- function(x) {
  ## Return a matrix that is the inverse of 'x'
  inverse <- x$getinverse()
  ## if inverse matrix already exists in 'x' then print message and return inverse matrix
  if(!is.null(inverse)) {
    message("getting cached data")
    return(inverse)
  }
  ## if inverse matrix doesn't exist then get matrix
  data <- x$get()
  ## compute inverse matrix
  inverse <- solve(data)
  ## set inverse matrix in 'x'
  x$setinverse(inverse)
  ## return inverse matrix
  inverse
}