Python Machine Learning

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "And already installed packages can be updated via the --upgrade flag."

A block of code is set as follows:

>>> import matplotlib.pyplot as plt >>> import numpy as np >>> y = df.iloc[0:100, 4].values >>> y = np.where(y == 'Iris-setosa', -1, 1) >>> X = df.iloc[0:100, [0, 2]].values >>> plt.scatter(X[:50, 0], X[:50, 1], ... color='red', marker='x', label='setosa') >>> plt.scatter(X[50:100, 0], X[50:100, ...