From 51e9a135cc2ccca39126c81f812a91e812aeeea9 Mon Sep 17 00:00:00 2001
From: kevinyang1704 <kevinyang14@gmail.com>
Date: Sun, 27 Sep 2015 10:26:46 -0400
Subject: [PATCH 1/2]  Changes to be committed: 	modified:   cachematrix.R

---
 cachematrix.R | 58 +++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 52 insertions(+), 6 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..07f983d4d9b 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,15 +1,61 @@
-## Put comments here that give an overall description of what your
-## functions do
+## makeCachematrix creates a special list of functions
+## that calculate inverse of a matrix and caches it
 
-## Write a short comment describing this function
+## 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
+  setinv <- function(solve) I <<- solve
+  getinv <- function () I
+  list (set = set, get = get,
+        setinv = setinv,
+        getinv = getinv)
 }
 
+makeVector <- function(x = numeric()) {
+  m <- NULL
+  set <- function(y) {
+    x <<- y
+    m <<- NULL
+  }
+  get <- function() x
+  setmean <- function(mean) m <<- mean
+  getmean <- function() m
+  list(set = set, get = get,
+       setmean = setmean,
+       getmean = getmean)
+}
 
-## Write a short comment describing this function
+## This function computes the inverse of the special "matrix" 
+##returned by makeCacheMatrix above.
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+## Return a matrix that is the inverse of 'x'
+  I <-x$getinv()
+  if(!is.null(I)) {
+    message("getting cached data")
+    return(I)
+  }
+  data <-x$get()
+  I <-solve(data,...)
+  x$setinv(I)
+  I
 }
+
+cachemean <- function(x, ...) {
+  m <- x$getmean()
+  if(!is.null(m)) {
+    message("getting cached data")
+    return(m)
+  }
+  data <- x$get()
+  m <- mean(data, ...)
+  x$setmean(m)
+  m
+}
\ No newline at end of file

From 2056a490b772aa9a2123cf2e2a1af348e45cee2d Mon Sep 17 00:00:00 2001
From: kevinyang1704 <kevinyang14@gmail.com>
Date: Sun, 27 Sep 2015 14:44:19 -0400
Subject: [PATCH 2/2] final version

---
 cachematrix.R | 25 -------------------------
 1 file changed, 25 deletions(-)

diff --git a/cachematrix.R b/cachematrix.R
index 07f983d4d9b..7db67600ed3 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -18,19 +18,6 @@ makeCacheMatrix <- function(x = matrix()) {
         getinv = getinv)
 }
 
-makeVector <- function(x = numeric()) {
-  m <- NULL
-  set <- function(y) {
-    x <<- y
-    m <<- NULL
-  }
-  get <- function() x
-  setmean <- function(mean) m <<- mean
-  getmean <- function() m
-  list(set = set, get = get,
-       setmean = setmean,
-       getmean = getmean)
-}
 
 ## This function computes the inverse of the special "matrix" 
 ##returned by makeCacheMatrix above.
@@ -47,15 +34,3 @@ cacheSolve <- function(x, ...) {
   x$setinv(I)
   I
 }
-
-cachemean <- function(x, ...) {
-  m <- x$getmean()
-  if(!is.null(m)) {
-    message("getting cached data")
-    return(m)
-  }
-  data <- x$get()
-  m <- mean(data, ...)
-  x$setmean(m)
-  m
-}
\ No newline at end of file