matplotlib example molahisto (snippet)

Python matplotlib example 'molahisto'

Modules used in program:

• import matplotlib.pyplot as plt
• import matplotlib.mlab as mlab
• import numpy as np
• import sys

python molahisto

Python matplotlib example: molahisto

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import unicode_literals

import sys
import numpy as np
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt

width = 20  # cm
height = 15 # cm

if len(sys.argv) < 4:
  print("Usage: molahisto.py data.txt title output")
  exit(1)

type = sys.argv[2].decode(encoding='UTF-8',errors='strict')
output = sys.argv[3]

data = np.fromfile(sys.argv[1], sep='\n')

num_bins = 8

fig, ax = plt.subplots()
n, bins, patches = ax.hist(data, num_bins, color='burlywood', histtype='stepfilled')

ax.set_xlabel('Constante Elástica (N/m)')
ax.set_ylabel('Contagem')
ax.set_title('%s' %type)
ax.set_ylim( None, n.max() * 1.2)

fig.tight_layout()

fig.set_size_inches(width / 2.54, height / 2.54)
plt.savefig('%s.png' %output, dpi=100)

Python links

• Learn Python: https://pythonbasics.org/
• Python Tutorial: https://pythonprogramminglanguage.com