Update cachematrix.R

atner · atner · commit dcc5b13e57f5 · 2016-03-25T08:43:54.000+03:00
задание2 для Coursera
diff --git a/cachematrix.R b/cachematrix.R
@@ -4,12 +4,28 @@
 ## Write a short comment describing this function
 
 makeCacheMatrix <- function(x = matrix()) {
-
+    inv <- NULL
+    set <- function(y) {
+        x <<- y
+        inv <<- NULL
+    }
+    get <- function() x
+    setinverse <- function(inverse) inv <<- inverse
+    getinverse <- function() inv
+    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'
+    inv <- x$getinverse()
+    if(!is.null(inv)) {
+        message("getting cached data.")
+        return(inv)
+    }
+    data <- x$get()
+    inv <- solve(data)
+    x$setinverse(inv)
+    inv
 }
