Completed programming assignment 2

Author: Jesse Kochis

cachematrix.R

@@ -1,15 +1,41 @@
-## Put comments here that give an overall description of what your
-## functions do
+## These functions allow the program to run more efficiently by
+## caching certain computations that maybe costly. In this case,
+## it caches the inverse of a matrix to avoid computing again.
 
-## Write a short comment describing this function
+## This function creates a special "matrix" object that can cache
+## its inverse.
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  invX <- NULL
+  set <- function(y) {
+    x <<- y
+    invX <<- NULL
+  }
+  get <- function() {
+    x
+  }
+  setInv <- function(inv) {
+    invX <<- inv
+  }
+  getInv <- function() {
+    invX
+  }
+  list(set = set, get = get, setInv = setInv, getInv = getInv)
 }
 
 
-## Write a short comment describing this function
+## This function computes the inverse of the special "matrix"
+## returned by makeCacheMatrix above. If the inverse has already
+## been calculated (and the matrix has not changed), then
+## cacheSolve should retrieve the inverse from the cache.
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  mat <- x$getInv()
+  if(!is.null(mat)) {
+    mat
+  }
+  data <- x$get()
+  mat <- solve(data)
+  x$setInv(mat)
+  mat
 }