diff --git a/cachematrix.R b/cachematrix.R index a50be65aa44..51f1a7298e7 100644 --- a/cachematrix.R +++ b/cachematrix.R @@ -1,15 +1,46 @@ ## Put comments here that give an overall description of what your ## functions do +## This library is creates a matrix that can cache it's inverse +## and gives computes the inverse of the created matrix + ## Write a short comment describing this function -makeCacheMatrix <- function(x = matrix()) { +## makeCacheMatrix: This function creates a special "matrix" object that can cache its inverse. +makeCacheMatrix <- function(x = matrix()) { + m <- NULL + set <- function(y) { + x <<- y + m <<- NULL + } + get <- function() x + ## Set and cache the inverse of the matrix using the solve function + setinverse <- function(solve) m <<- inverse + getinverse <- function() m + ## Create a list containing a function to set the value of the matrix, get the value of the matrix, + ## set the value of the inverse, and get the value of the inverse. + list(set=set, get=get, setinverse=setinverse, getinverse=getinverse) + } ## Write a short comment describing this function +## 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. cacheSolve <- function(x, ...) { - ## Return a matrix that is the inverse of 'x' + m <- x$getinverse() + ## check to see if there is already a cached inverse + if(!is.null(m)) { + message("getting cached data") + return(m) + } + + ## If there is no cached inverse calculate the inverse, cache it and return it + data <- x$get() + m <- solve(data, ...) + x$setinverse(m) + m }