diff --git a/Gaussians.ipynb b/Chapter04_Gaussians/Gaussians.ipynb
similarity index 100%
rename from Gaussians.ipynb
rename to Chapter04_Gaussians/Gaussians.ipynb
diff --git a/Signals_and_Noise.ipynb b/Signals_and_Noise.ipynb
deleted file mode 100644
index db29029..0000000
--- a/Signals_and_Noise.ipynb
+++ /dev/null
@@ -1,257 +0,0 @@
-{
- "metadata": {
- "name": "",
- "signature": "sha256:f0360fc9458bd40069073ce91309aab5fcae24de06b9e4ddd9a1b31f7c2e3b96"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Signals and Noise"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#format the book\n",
- "%matplotlib inline\n",
- "from __future__ import division, print_function\n",
- "import matplotlib.pyplot as plt\n",
- "import book_format\n",
- "book_format.load_style()"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "html": [
- "\n",
- "\n"
- ],
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 1,
- "text": [
- ""
- ]
- }
- ],
- "prompt_number": 1
- }
- ],
- "metadata": {}
- }
- ]
-}
\ No newline at end of file
diff --git a/book_format.py b/code/book_format.py
similarity index 100%
rename from book_format.py
rename to code/book_format.py
diff --git a/Chapter01_gh_filter/gh_internal.py b/code/gh_internal.py
similarity index 100%
rename from Chapter01_gh_filter/gh_internal.py
rename to code/gh_internal.py
diff --git a/Untitled0.ipynb b/exp/Untitled0.ipynb
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rename from Untitled0.ipynb
rename to exp/Untitled0.ipynb
diff --git a/x.ipynb b/x.ipynb
deleted file mode 100644
index e69de29..0000000