diff --git a/cachematrix.R b/cachematrix.R index a50be65aa44..7b2fc2c25b9 100644 --- a/cachematrix.R +++ b/cachematrix.R @@ -1,15 +1,28 @@ -## Put comments here that give an overall description of what your -## functions do +## Pair of functions that cache the inverse of a matrix. -## Write a short comment describing this function +## This function creates a special "matrix" object that can cache its inverse. makeCacheMatrix <- function(x = matrix()) { - + inverse <- NULL + set <- function(m) { + x <<- m + inverse <<- NULL + } + get <- function() x + setinverse <- function(new_inverse) inverse <<- new_inverse + getinverse <- function() inverse + list(set = set, get = get, setinverse = setinverse, getinverse = getinverse) } - -## Write a short comment describing this function - -cacheSolve <- function(x, ...) { - ## Return a matrix that is the inverse of 'x' +## This function computes the inverse of the special "matrix" returned by makeCacheMatrix above +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 }