Why Can't I See My Matplotlib Plots Inline in My IPython Notebook on macOS?

Displaying Matplotlib Plots Inline in IPython Notebooks

You are facing an issue where inline matplotlib graphics fail to display within your IPython notebook on macOS X. Let's delve into the problem and find a solution.

Initial Attempts

You have already tried setting "%matplotlib inline" and "%pylab inline," but these have yielded no results. Additionally, using the "--pylab=inline" flag in the command line has not had an impact.

Possible Solution

One possible solution is to place the "%matplotlib inline" command in the very first cell of your notebook. This directive explicitly instructs IPython to display matplotlib plots inline within the notebook rather than opening a separate figure window.

Code Snippet:

%matplotlib inline

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

Setting Default Configuration

To ensure inline plotting is enabled by default for all IPython kernels, you can modify the following configuration option in your config files:

c.IPKernelApp.matplotlib = 'inline'

This setting will configure matplotlib for interactive use with the default backend, which is set to inline mode.

Verification

Once you have made these adjustments, you should be able to visualize matplotlib plots inline within your IPython notebook. To verify the change, run the following code:

x = np.linspace(0, 3*np.pi, 500)
plt.plot(x, np.sin(x**2))
plt.title('A simple chirp')

If all goes well, you will now see the plot displayed within the notebook instead of receiving the string representation of the figure object.

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