Adds boolean indexing reflection notes

craigsdennis · craigsdennis · commit 093d639b20aa · 2018-07-02T16:51:25.000-07:00
diff --git a/Introduction to NumPy.ipynb b/Introduction to NumPy.ipynb
@@ -847,6 +847,19 @@
     "study_minutes[1, 1] = 360"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Boolean Array Indexing\n",
+    "* You can create a boolean array by using comparison operators on an array.\n",
+    "  * You can use boolean arrays for fancy indexing.\n",
+    "  * Boolean arrays can be compared by using bitwise operators (`&`, `|`)\n",
+    "      * Do not use the `and` keyword.\n",
+    "      * Remember to mind the order of operations when combining\n",
+    "* Even though boolean indexing returns a new array, you can update an existing array using a boolean index."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 44,
