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#!/usr/bin/env python
import matplotlib.pyplot as plt
import numpy as np
import sys
if sys.argv[1]:
filename=sys.argv[1]
else:
filename='infnoise.bin'
bp = np.dtype([('byte1',np.uint8),('byte2',np.uint8)]) # 'struct' byte pairs
Z = np.fromfile(filename, dtype=bp, count=2000) # read 2000 byte pairs from binary file
x, y = zip(*Z) # unpack Z pairs into lists
plt.grid(True)
plt.xlim(0, 255)
plt.ylim(0, 255)
plt.xlabel('bytes')
plt.ylabel('bytes')
plt.title('TRNG ' + filename)
plt.scatter(x[:1000],y[:1000])
plt.savefig(filename + '-scatter.png')
plt.show()
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