| """ | |
| ============= | |
| Custom Ticker | |
| ============= | |
| The :mod:`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. | |
| ax.yaxis.set_major_formatter(millions) | |
| money = [1.5e5, 2.5e6, 5.5e6, 2.0e7] | |
| ax.bar(['Bill', 'Fred', 'Mary', 'Sue'], money) | |
| plt.show() | |
| # %% | |
| # | |
| # .. admonition:: References | |
| # | |
| # The use of the following functions, methods, classes and modules is shown | |
| # in this example: | |
| # | |
| # - `matplotlib.axis.Axis.set_major_formatter` | |