Quick and dirty histogram using Matplotlib

quick_histogram.py

# Quick and dirty histogram using Matplotlib
# Reads a file full of numbers and creates a histogram.

import sys
import matplotlib.pyplot as plt

for file in sys.argv[1:]:
    with open(file) as f:
        values = [float(x) for x in f]
        plt.hist(values, bins=100, log=True, label=file)

plt.xlabel('Values')
plt.ylabel('Frequency')
if len(sys.argv) > 1: plt.legend()
plt.show()