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# Matplotlib.axis.Axis.zoom() function in Python

• Last Updated : 08 Jun, 2020

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. It is an amazing visualization library in Python for 2D plots of arrays and used for working with the broader SciPy stack.

## Matplotlib.axis.Axis.zoom() Function

The Axis.zoom() function in axis module of matplotlib library is used to zoom in or out on axis .

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Syntax: Axis.zoom(self, direction)

Parameters: This method accepts the following parameters.

• direction: This parameter is the value to zoom in (direction > 0) or zoom out (direction <= 0).

Return value: This method does not return any value.

Below examples illustrate the matplotlib.axis.Axis.zoom() function in matplotlib.axis:

Example 1:

## Python3

 `# Implementation of matplotlib function``from` `matplotlib.axis ``import` `Axis``import` `matplotlib.pyplot as plt ``import` `numpy as np ``   ` `fig, ax ``=` `plt.subplots() ``ax.plot([``1``, ``2``, ``3``])  ``   ` `ax.xaxis.zoom(``3``)``  ` `ax.grid() ``  ` `fig.suptitle(``"""matplotlib.axis.Axis.zoom()``function Example\n"""``, fontweight ``=``"bold")  ``    ` `plt.show()`

Output: Example 2:

## Python3

 `# Implementation of matplotlib function``from` `matplotlib.axis ``import` `Axis``import` `numpy as np ``import` `matplotlib.pyplot as plt ``from` `matplotlib.widgets ``import` `Slider, Button, RadioButtons ``      ` `fig, ax1 ``=` `plt.subplots() ``plt.subplots_adjust(bottom ``=` `0.25``) ``t ``=` `np.arange(``0.0``, ``1.0``, ``0.001``) `` ` `a0 ``=` `5``f0 ``=` `3``delta_f ``=` `5.0``s ``=` `a0 ``*` `np.sin(``2` `*` `np.pi ``*` `f0 ``*` `t) ``      ` `ax1.plot(t, s, lw ``=` `2``, color ``=` `'green'``) `` ` `ax1.xaxis.zoom(``-``2``)``  ` `ax1.grid() ``  ` `fig.suptitle(``"""matplotlib.axis.Axis.zoom()``function Example\n"""``, fontweight ``=``"bold")  ``    ` `plt.show()`

Output: My Personal Notes arrow_drop_up