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diff --git a/Assignment 1/ex12.py b/Assignment 1/ex12.py
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+# -*- coding: utf-8 -*-
+"""
+Created on Fri Sep 11 13:12:03 2015
+
+@author: camilstaps
+"""
+
+from __future__ import print_function
+import xlrd
+import numpy as np
+import matplotlib.lines as pltlines
+import matplotlib.patches as pltpatches
+import matplotlib.pyplot as plt
+
+# 1.2.1 a
+
+xls = xlrd.open_workbook(filename='Data/nanonose.xls')
+xls = xls.sheet_by_index(0)
+
+fst_col, fst_row = 3, 2
+data = np.asmatrix([xls.col_values(i)[fst_row:] 
+        for i in range(fst_col,fst_col + 8)])
+
+# 1.2.1 b
+colors = {'Water':      '#61d4fa',
+          'Ethanol':    '#ff3333', 
+          'Acetone':    '#549900', 
+          'Heptane':    '#d9910d', 
+          'Pentanol':   '#990096'}
+graph_colors = [colors[r] for r in xls.col_values(0)[fst_row:]]
+
+xs = xls.col_values(1)[fst_row:]
+
+fig = plt.figure(figsize=(12,6))
+ax = plt.gca()
+ax.set_xscale('log')
+ax.set_yscale('symlog')
+plt.xlim([80,10 ** 5])
+plt.ylim([-1, 500])
+
+ax.scatter(xs, data.tolist()[0], s=60, c=graph_colors, alpha=0.4, marker='s')
+ax.scatter(xs, data.tolist()[1], s=60, c=graph_colors, alpha=0.4, marker='o')
+
+line_a = pltlines.Line2D([], [], ls=' ', marker='s', label='A', c='w')
+line_b = pltlines.Line2D([], [], ls=' ', marker='o', label='B', c='w')
+handles = [pltpatches.Patch(label=k, color=v) for k, v in colors.iteritems()] + [line_a, line_b]
+ax.legend(handles=handles, numpoints=1, loc=2)
+
+plt.show()