Revisions#1

Revisions made to stub files by student SGC

Author: GailCrad

cachematrix.R

@@ -1,15 +1,42 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
-
-makeCacheMatrix <- function(x = matrix()) {
+## code source:  desktop>coursera>ProgrammingAssignment2>cachematrix.R
+## programmer:   SGC, Raleigh,NC
 
+## Function creates a sepcial matrix which
+## * Sets the value of the matrix
+##   Gets the value of the matrix
+##   Sets the value of the matrix inverse
+##   Gets the value of the matrix inverse
+makeCasheMatrix <- function(x = matrix()) {
+  m <- NULL
+  set <- function(y) {
+    x <<- y
+    m <<- NULL
+  }
+  get <- function() x
+  setsolve <- function(solve) m <<- solve
+  getsolve <- function() m
+  matrix(set = set, get = get,
+         setsolve = setsolve,
+         getsolve = getsolve)
 }
 
 
-## Write a short comment describing this function
+##The following function calculates the inverse of the special "matrix" 
+##created with the above function. However, it first checks to see 
+##if the inverse has already been calculated. If so, it gets the inverse
+##from the cache and skips the computation. Otherwise, it calculates 
+##the inverse of the data matrix and 
+##sets the value of the inverse in the cache via the setsolve function.
+
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
-}
+  m <- x$getsolve()
+  if(!is.null(m)) {
+    message("getting cached data")
+    return(m)
+  }
+  data <- x$get()
+  m <- solve(data, ...)
+  x$setsolve(m)
+  m
+}