Merge branch 'make_cacheable_matrix'

* make_cacheable_matrix:
  Add function to compute solve (inverse) and cache it or return the cached value
  Add function to build matrix with cacheable solve (inverse)
  Add file description comments

Author: Sean Hill

cachematrix.R

@@ -1,15 +1,37 @@
-## Put comments here that give an overall description of what your
-## functions do
+## These functions create a matrix with a cacheable inverse
+## Use the makeCacheMatrix to return a cacheable matrix and then use
+## cacheSolve to compute the inverse and cache it or return the cached inverse
 
-## Write a short comment describing this function
+## This function takes a matrix and returns a list of functions for caching its inverse
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  s <- NULL
+  
+  set <- function(y) {
+    x <<- y
+    s <<- NULL
+  }
+  
+  get <- function() x
+  
+  set_solve <- function(solve) s <<- solve
+  get_solve <- function() s
+  
+  list(set = set, get = get, set_solve = set_solve, get_solve = get_solve)
 }
 
-
-## Write a short comment describing this function
+## This function will compute the inverse and cache it or return the cached inverse
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  s <- x$get_solve()
+  
+  if(!is.null(s)) {
+    message("getting cached data.")
+    return(s)
+  }
+  
+  data <- x$get()
+  s <- solve(data, ...)
+  x$set_solve(s)
+  s
 }