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Reword custom_ticker1 example. #21019

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Sep 8, 2021
Merged

Reword custom_ticker1 example. #21019

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23 changes: 10 additions & 13 deletions examples/ticks/custom_ticker1.py
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Original file line number Diff line number Diff line change
@@ -1,28 +1,27 @@
"""
==============
Custom Ticker1
==============
=============
Custom Ticker
=============

The new ticker code was designed to explicitly support user customized
ticking. The documentation of :mod:`matplotlib.ticker` details this
process. That code defines a lot of preset tickers but was primarily
designed to be user extensible.
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
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

money = [1.5e5, 2.5e6, 5.5e6, 2.0e7]
import matplotlib.pyplot as plt


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


fig, ax = plt.subplots()
# Use automatic FuncFormatter creation
# 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()

Expand All @@ -33,6 +32,4 @@ def millions(x, pos):
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.pyplot.subplots`
# - `matplotlib.axis.Axis.set_major_formatter`
# - `matplotlib.ticker.FuncFormatter`