Implement makeCacheMatrix and cacheSolve

lmarlow · lmarlow · commit db437bc596f9 · 2014-11-21T16:38:35.000-07:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,15 +1,33 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## The following functions can create matrix which will cache its inverse
+## for quick "calculation" in future calls.
 
+## Make a matrix which can store a value for its inverse
+## instead of solving for it every time.
 makeCacheMatrix <- function(x = matrix()) {
-
+        s <- NULL
+        set <- function(y) {
+                x <<- y
+                s <<- NULL
+        }
+        get <- function() x
+        setsolve <- function(solve) s <<- solve
+        getsolve <- function() s
+        list(set = set, get = get,
+             setsolve = setsolve,
+             getsolve = getsolve)
 }
 
 
-## Write a short comment describing this function
-
+## Calculate and cache the inverse of a matrix.
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
+        s <- x$getsolve()
+        if(!is.null(s)) {
+                message("getting cached data")
+                return(s)
+        }
+        data <- x$get()
+        s <- solve(data, ...)
+        x$setsolve(s)
+        s
 }
