How Can I Customize Tick Label Text in Matplotlib?

Modify Tick Label Text

Question:

I wish to customize the tick labels on a plot but cannot seem to modify their text. How can I make this modification?

Answer:

Modifying tick label text in versions of matplotlib newer than 1.1.0 requires a few steps:

1. Draw the Canvas: Force the canvas to render to position and assign values to the tick labels.
2. Retrieve Labels: Use ax.get_xticklabels() to access the tick labels.
3. Assign Text: Modify the text of the label at the desired index.
4. Set Labels: Update the tick labels using ax.set_xticklabels(labels).

Behind the Scene:

Matplotlib uses a dynamic positioning system for elements like ticks and labels. To prevent static positioning, you need to activate FixedLocator and FixedFormatter. This ensures that the tick labels remain unchanged after modification. The ax.*axis.set_ticklabels method handles this process for you.

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