Custom Ticker#

The matplotlib.ticker module defines many preset tickers, but was primarily designed for extensibility, i.e., to support user customized ticking.

In this example, a user defined function is used to format the ticks in millions of dollars on the y-axis.

import matplotlib.pyplot as plt

def millions(x, pos):
    """The two arguments are the value and tick position."""
    return f'${x*1e-6:1.1f}M'

fig, ax = plt.subplots()
# set_major_formatter internally creates a FuncFormatter from the callable.
money = [1.5e5, 2.5e6, 5.5e6, 2.0e7]['Bill', 'Fred', 'Mary', 'Sue'], money)
custom ticker1


The use of the following functions, methods, classes and modules is shown in this example:

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