cachematrix.R

# This is my first edit.
# This is my second edit.


## makeCacheMatrix: This function creates a special "matrix" object that can cache its inverse.
## cacheSolve: This function 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.
## Computing the inverse of a square matrix can be done with the solve function in R.

## This function creates a special "matrix" object that can cache its inverse.
makeCacheMatrix <- function(x = matrix()) {
    inverse <- NULL
    set <- function(y) {
        x <<- y
        inverse <<- NULL
    }
    get <- function() x
    setinverse <- function(inv) inverse <<- inv
    getinverse <- function() inverse
    list(set=set, get=get, setinverse=setinverse, getinverse=getinverse)
}


## Returns the inverse if it exists,
## else runs R's solve on the matrix to find the inverse,
## and stores the inverse.
cacheSolve <- function(x, ...) {
        inverse <- x$getinverse()
        if(!is.null(inverse)) {
                message("getting cached data")
                return(inverse)
        }
        data <- x$get()
        inverse <- solve(data, ...)
        x$setinverse(inverse)
        inverse
}