Solution for the 'Caching the Inverse of a Matrix' assignment

Dmitriy Morozov · Dmitriy Morozov · commit 2264a23257a0 · 2015-04-25T11:28:11.000+03:00
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,15 +1,29 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## Following is a pair of functions that cache the inverse of a matrix.
 
+## Creates a special "matrix" object that can cache it's inverse
 makeCacheMatrix <- function(x = matrix()) {
-
+  m <- NULL
+  
+  set <- function(y) {
+    x <<- y
+    m <<- NULL
+  }
+  get <- function() x
+  setInverse <- function(matrix) m <<- matrix
+  getInverse <- function() m
+  list(set = set, get = get, setInverse = setInverse, getInverse = getInverse)
 }
 
-
-## Write a short comment describing this function
-
+## Computes the inverse of the special "matrix" returned by makeCacheMatrix function above.
+## If the inverse has already been calculated, then returns the inverse from the cache.
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  m <- x$getInverse()
+  if(!is.null(m)) {
+    message("getting cached data")
+    return(m)
+  }
+  data <- x$get()
+  m <- solve(data, ...)
+  x$setInverse(m)
+  m
 }
