Moved book generation code into PDF directory

Start of a reorganization of files to make book more browable and to
reduce the size of links to chapters.

exp/balzer.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Sat Jan 24 15:20:47 2015
+
+@author: rlabbe
+"""
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+try:
+    data
+except:
+    cols = ('time','millis','ax','ay','az','rollrate','pitchrate','yawrate',
+            'roll','pitch','yaw','speed','course','latitude','longitude',
+            'altitude','pdop','hdop','vdop','epe')
+    data = np.genfromtxt('2014-03-26-000-Data.csv', delimiter=',',
+                         names=True, usecols=cols).view(np.recarray)
+
+
+
+plt.subplot(311)
+plt.plot(data.ax)
+plt.subplot(312)
+plt.plot(data.speed)
+plt.subplot(313)
+plt.plot(data.course)
+plt.tight_layout()
+
+plt.figure()
+plt.subplot(311)
+plt.plot(data.pitch)
+plt.subplot(312)
+plt.plot(data.roll)
+plt.subplot(313)
+plt.plot(data.yaw)
+plt.figure()
+plt.plot(data.longitude, data.latitude)