NumPy TutorialLesson 12Free preview

NumPy Array Join

This lesson is part of NumPy · All levels

Summary

An array merger is done with np.concatenate that connects data on a particular axis. np.stack is different: it creates a new dimension of flat arrays. Also available are vstack aliases for vertical joining and hstack for horizontal, so that the selection of functions follows the desired orientation.

Key points

Np.concatenate connects arrays to an existing (default axis 0).
Np.stack creates a new dimension, suitable for an array of the same shape.
Vstack combines down, hstack combines to the side.
All arrays combined must fit in dimensions other than the axis of the merger.

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.