Revert "Revert "R Programming Assignment 2""

ipcoder · ipcoder · commit 84044a2749ed · 2015-02-01T09:54:51.000+02:00
This reverts commit 0547a40.
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,15 +1,36 @@
-## Put comments here that give an overall description of what your
-## functions do
+## functions providing means to cache inverse matrix operations
+## Two functions below to be used together to create inverse the matrix objects
 
-## Write a short comment describing this function
+## creates a special "matrix" object that can cache its inverse
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  inv <- NULL
+  set <- function(y) {
+    x <<- y
+    inv <<- NULL
+  }
+  
+  get <- function() x
+  setinv <- function(invmat) inv <<- invmat
+  getinv <- function() inv
+  list(set = set, get = get,
+       setinv = setinv,
+       getinv = getinv)
 }
 
 
-## Write a short comment describing this function
+##  computes the inverse of the special "matrix" returned by makeCacheMatrix
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
-}
+  inv <- x$getinv()
+  if(!is.null(inv)) {
+    message("getting cached data")
+    return(inv)
+  }
+  data <- x$get()
+  inv <- solve(data, ...)
+  x$setinv(inv)
+  inv
+
+}
