How to Specify the Format of Float Tick Labels in Matplotlib?

Specifying Format of Floats for Tick Labels in Matplotlib

When working with floating-point numbers in Matplotlib plots, it can be desirable to control the format of numeric tick labels. To prevent scientific notation on the y-axis, one may use ScalarFormatter(useOffset=False). However, further customization of the format, such as specifying the number of decimal places, may be necessary.

To set the desired format, utilize the FormatStrFormatter class from the matplotlib.ticker module. For instance, to display two decimal digits for tick labels on the y-axis:

<code class="python">from matplotlib.ticker import FormatStrFormatter

fig, ax = plt.subplots()

ax.yaxis.set_major_formatter(FormatStrFormatter('%.2f'))</code>

Alternatively, to remove decimal places entirely:

<code class="python">ax.yaxis.set_major_formatter(FormatStrFormatter('%g'))</code>

By passing the appropriate format string to FormatStrFormatter, one can control the appearance of numeric tick labels, ensuring they meet the desired precision and clarity for the given plot.

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