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danpalmer/autocorrelation.py

Created March 30, 2014 18:03
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autocorrelation.py
import matplotlib.pyplot as plt
import numpy as np
input = open("stage2-input.bin", "rb").read()
bin = map(int, list(''.join(map(lambda s: s[2:], map(bin, map(ord, list(input)))))))
results = np.correlate(bin, bin, mode='full')
results = results[results.size/2:]
plt.plot(results[0:255])
plt.show()
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