日付ティックロケーターとフォーマッター#

この例は、さまざまな日付ロケーターとフォーマッターの使用法と効果を示しています。

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.ticker as ticker
from matplotlib.dates import (AutoDateLocator, YearLocator, MonthLocator,
                              DayLocator, WeekdayLocator, HourLocator,
                              MinuteLocator, SecondLocator, MicrosecondLocator,
                              RRuleLocator, rrulewrapper, MONTHLY,
                              MO, TU, WE, TH, FR, SA, SU, DateFormatter,
                              AutoDateFormatter, ConciseDateFormatter)

locators = [
    ('AutoDateLocator(maxticks=8)', '2003-02-01', '%Y-%m'),
    ('YearLocator(month=4)', '2003-02-01', '%Y-%m'),
    ('MonthLocator(bymonth=[4,8,12])', '2003-02-01', '%Y-%m'),
    ('DayLocator(interval=180)', '2003-02-01', '%Y-%m-%d'),
    ('WeekdayLocator(byweekday=SU, interval=4)', '2000-07-01', '%a %Y-%m-%d'),
    ('HourLocator(byhour=range(0,24,6))', '2000-02-04', '%H h'),
    ('MinuteLocator(interval=15)', '2000-02-01 02:00', '%H:%M'),
    ('SecondLocator(bysecond=(0,30))', '2000-02-01 00:02', '%H:%M:%S'),
    ('MicrosecondLocator(interval=1000)', '2000-02-01 00:00:00.005', '%S.%f'),
    ('RRuleLocator(rrulewrapper(freq=MONTHLY, \nbyweekday=(MO, TU, WE, TH,' +
     ' FR), bysetpos=-1))', '2000-07-01', '%Y-%m-%d')
]

formatters = [
    ('AutoDateFormatter(ax.xaxis.get_major_locator())'),
    ('ConciseDateFormatter(ax.xaxis.get_major_locator())'),
    ('DateFormatter("%b %Y")')
]


def plot_axis(ax, locator=None, xmax='2002-02-01', fmt=None, formatter=None):
    """Set up common parameters for the Axes in the example."""
    ax.spines.right.set_visible(False)
    ax.spines.left.set_visible(False)
    ax.spines.top.set_visible(False)
    ax.yaxis.set_major_locator(ticker.NullLocator())
    ax.tick_params(which='major', width=1.00, length=5)
    ax.tick_params(which='minor', width=0.75, length=2.5)
    ax.set_xlim(np.datetime64('2000-02-01'), np.datetime64(xmax))
    if locator:
        ax.xaxis.set_major_locator(eval(locator))
        ax.xaxis.set_major_formatter(DateFormatter(fmt))
    else:
        ax.xaxis.set_major_formatter(eval(formatter))
    ax.text(0.0, 0.2, locator or formatter, transform=ax.transAxes,
            fontsize=14, fontname='Monospace', color='tab:blue')


fig, ax = plt.subplots(len(locators), 1, figsize=(8, len(locators) * .8),
                       layout='constrained')
fig.suptitle('Date Locators')
for i, loc in enumerate(locators):
    plot_axis(ax[i], *loc)

fig, ax = plt.subplots(len(formatters), 1, figsize=(8, len(formatters) * .8),
                       layout='constrained')
fig.suptitle('Date Formatters')
for i, fmt in enumerate(formatters):
    plot_axis(ax[i], formatter=fmt)

参考文献

この例では、次の関数、メソッド、クラス、およびモジュールの使用が示されています。

スクリプトの合計実行時間: ( 0 分 2.097 秒)

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