cachematrix.R

## creates a special "matrix", which is really a list containing a function to
## set the value of the matrix
## get the value of the matrix
## set the value of the inverse
## get the value of the inverse

makeCacheMatrix <- function(x = matrix()) {
  m <- NULL
  set <- function(y) {
    x <<- y
    m <<- NULL
  }
  get <- function() x
  setsolve <- function(invert) m <<- invert
  getsolve <- function() m
  list(set = set, get = get,
       setsolve = setsolve,
       getsolve = getsolve)
}


## Calculates the inverse of the special "matrix" created with the above function. 
## It first checks to see if the inverse has already been calculated. 
## If so, it gets the inverse from the cache and skips the computation. 
## Otherwise, it calculates the inverse of the data and sets the value of the inverse in the cache via the setsolve function.
cacheSolve <- function(x, ...) {
        ## Return a matrix that is the inverse of 'x'
    m <- x$getsolve()
    if(!is.null(m)) {
      message("getting cached data")
      return(m)
    }
    data <- x$get()
    invert <- solve(data, ...)
    x$setsolve(invert)
    invert
}