iDevji

This post discusses Apache log visualization with Matplotlib library. First, download the data file used in this example from here.

We will require numpy and matplotlib

In [1]:

import numpy as np
import matplotlib.pyplot as plt

numpy.loadtext() can directly load a text file in an array requests-idevji.txt contains only hour on which request was made, this is achieved by pre-prcoessing the Apache log.

In [2]:

data = np.loadtxt (‘requests-idevji.txt’)

We need 24 bins because we have 24 hours’ data. For other attributes of hist() see references.

In [3]:

plt.hist(data, bins=24)
plt.title(“Requests @ iDevji”)
plt.xlabel(“Hours”)
plt.ylabel(“# Requests”)

Out[3]:

Text(0,0.5,’# Requests’)

In [4]:

plt.show()


References:

1. numpy.loadtext(), Scipy.org
2. PyPlot API, Matplotlib.org