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+#!/usr/bin/env python3
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+
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+# Sorensen-Dice coefficient: $\frac{2|X \cap Y|}{|X| + |Y|}
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+
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+match_wifi_num_crit = 1
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+
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+def dsc(known_pt, new_pt):
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+ a = known_pt.wifi_snr
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+ b = new_pt.wifi_snr
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+ up = 0
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+ for mac in a:
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+ if mac in b:
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+ up += 1
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+ if up < match_wifi_num_crit:
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+ return None
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+ return 2 * up / (len(a) + len(b))
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+
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+if __name__ == '__main__':
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+ from wifiloc import toplev
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+ toplev(infile = "basicdata.csv", sim = dsc, bad_wifi_crit = 5000,
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+ sim_crit = 0.0)
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