Localizadores e formatadores de marcação de data #

Este exemplo ilustra o uso e o efeito dos vários localizadores e formatadores de data.

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)

Referências

O uso das seguintes funções, métodos, classes e módulos é mostrado neste exemplo:

Tempo total de execução do script: ( 0 minutos 2,097 segundos)

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