From 475e930f8ee187d7dd8a8fb3d85efda6c5f39d7b Mon Sep 17 00:00:00 2001
From: Donne Martin <donne.martin@gmail.com>
Date: Thu, 9 Apr 2015 13:28:09 -0400
Subject: [PATCH] Added numpy snippets for reshaping and in-place editing.

---
 numpy/numpy.ipynb | 120 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)

diff --git a/numpy/numpy.ipynb b/numpy/numpy.ipynb
index fa03f72..852a696 100644
--- a/numpy/numpy.ipynb
+++ b/numpy/numpy.ipynb
@@ -322,6 +322,126 @@
       }
      ],
      "prompt_number": 14
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "## Reshaping and In-Place Updating"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "e = np.arange(12)\n",
+      "print(e)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "[ 0  1  2  3  4  5  6  7  8  9 10 11]\n"
+       ]
+      }
+     ],
+     "prompt_number": 15
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# f is a view of contents of e\n",
+      "f = e.reshape(3, 4)\n",
+      "print(f)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "[[ 0  1  2  3]\n",
+        " [ 4  5  6  7]\n",
+        " [ 8  9 10 11]]\n"
+       ]
+      }
+     ],
+     "prompt_number": 16
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Set last five values of e to zero\n",
+      "e[5:] = 0\n",
+      "print(e)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "[0 1 2 3 4 0 0 0 0 0 0 0]\n"
+       ]
+      }
+     ],
+     "prompt_number": 17
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# f is also updated\n",
+      "f"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 18,
+       "text": [
+        "array([[0, 1, 2, 3],\n",
+        "       [4, 0, 0, 0],\n",
+        "       [0, 0, 0, 0]])"
+       ]
+      }
+     ],
+     "prompt_number": 18
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# OWNDATA shows f does not own its data\n",
+      "f.flags"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 19,
+       "text": [
+        "  C_CONTIGUOUS : True\n",
+        "  F_CONTIGUOUS : False\n",
+        "  OWNDATA : False\n",
+        "  WRITEABLE : True\n",
+        "  ALIGNED : True\n",
+        "  UPDATEIFCOPY : False"
+       ]
+      }
+     ],
+     "prompt_number": 19
     }
    ],
    "metadata": {}