Why are My Matplotlib Plots Saving as Blank Images?

Troubleshooting Blank Images in Matplotlib Savefig

When attempting to save Matplotlib plots as images, you may encounter instances where the resulting images are blank. Here's a guided exploration to resolve this issue:

Understanding the Issue:

You have provided code that attempts to save a Matplotlib figure as a PNG image using plt.savefig(), but the output image is empty.

Potential Causes and Solutions:

1. Figure Handling after plt.show(): Calling plt.show() creates a new figure window, potentially leaving the original figure without any plots to save. To avoid this:

   • Save the figure using plt.savefig() before calling plt.show().
   • Alternatively, get the current figure after plt.show() using plt.gcf(). You can then save the figure from this object.

2. Subplot Configuration: Ensure that the subplot indices passed in plt.subplot() are correct. In your code:

   • If T0 is not None, the number of subplots changes. Consider adjusting the indices accordingly, such as using 131, 132, and 133.
   • Otherwise, verify that the indices appropriately represent the number of subplots you intend to create.

By addressing these potential causes, you can resolve the issue of saving blank images in your Matplotlib code.

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