Commit rdpeng#2

chernir · chernir · commit cbfbdab70358 · 2021-05-27T16:59:08.000-04:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,12 +1,33 @@
-##CHANGE TEST
+##This function creates a special "matrix" object that can cache its inverse.
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  i <- NULL
+  set <- function(y) {
+    x <<- y
+    i <<- NULL
+  }
+  get <- function() x
+  setinverse <- function(inverse) i <<- inverse
+  getinverse <- function() i
+  list(set = set,
+       get = get,
+       setinverse = setinverse,
+       getinverse = getinverse)
 }
 
 
-## Write a short comment describing this function
+## 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
+##`cacheSolve` should retrieve the inverse from the cache.
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  i <- x$getinverse()
+  if (!is.null(i)) {
+    message("Getting Cached Data")
+    return(i)
+  }
+  data <- x$get()
+  i <- solve(data, ...)
+  x$setinverse(i)
+  i
 }
