Visual enhancements

Recommendation/MLPMF.ipynb

@@ -7,6 +7,17 @@
     "# Recommend movies using Matrix Factorization with Gluon"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Demonstrates matrix factorization with MXNet on the MovieLens 100k dataset. We perform collaborative filtering, where the recommendations are based on previous rating of users.\n",
+    "\n",
+    "We are trying to learn embeddings for users and movies, based on user partial ratings of movies, to estimate future movie ratings\n",
+    "\n",
+    "![](https://i.imgur.com/twyWChh.png)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
@@ -353,9 +364,16 @@
     "net.collect_params()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Visualize network"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 28,
    "metadata": {
     "slideshow": {
      "slide_type": "skip"
@@ -510,19 +528,16 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<graphviz.dot.Digraph at 0x105d2e9b0>"
+       "<graphviz.dot.Digraph at 0x119f87780>"
       ]
      },
-     "execution_count": 9,
+     "execution_count": 28,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
-    "input_sym1 = mx.sym.var('user')\n",
-    "input_sym2 = mx.sym.var('item')\n",
-    "output_sym = net(input_sym1, input_sym2)\n",
-    "mx.viz.plot_network(output_sym, )"
+    "mx.viz.plot_network(net(mx.sym.var('user'), mx.sym.var('item')))"
    ]
   },
   {
@@ -759,7 +774,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [
     {
@@ -770,14 +785,22 @@
        "<NDArray 10 @cpu(0)>"
       ]
      },
-     "execution_count": 24,
+     "execution_count": 25,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
     "recommend_k_items_for_user(10)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# More examples of MXNet-based recommenders\n",
+    "https://github.com/apache/incubator-mxnet/blob/master/example/recommenders/demo1-MF.ipynb"
+   ]
   }
  ],
  "metadata": {