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我能够使用以下（仅相关的）代码运行“mpl_finance”candlestick_ohlc 函数，并且图表按预期显示：

mondays = WeekdayLocator(MONDAY)        # major ticks on the mondays
alldays = DayLocator()              # minor ticks on the days
weekFormatter = DateFormatter('%b %d')  # e.g., Jan 12
dayFormatter = DateFormatter('%d')      # e.g., 12

fig, ax = plt.subplots()
fig.subplots_adjust(bottom=0.2)
ax.xaxis.set_major_locator(mondays)
ax.xaxis.set_minor_locator(alldays)
ax.xaxis.set_major_formatter(weekFormatter)

candlestick_ohlc(ax, zip(mdates.date2num(quotes.index.to_pydatetime()),
                         quotes['open'], quotes['high'],
                         quotes['low'], quotes['close']),
                 width=0.6)

ax.xaxis_date()
ax.autoscale_view()
plt.setp(plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
plt.title('PETR4 daily quotes')
plt.show()

现在我想在这张图上“添加”（比如）一条水平红线 y = 26.5 ...我应该如何进行？

（我真正的问题是：我应该如何/在哪里输入类似 axvline(...) 的内容，以便能够使新数据出现在同一个图表中？）

谢谢！

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1 回答 1

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当然，大卫G。再次感谢你的帮助。希望在其他帖子中见到你。

感兴趣的读者将能够在下面改编这个“真实的东西”（它正在工作）！

mondays = WeekdayLocator(MONDAY)        # major ticks on the mondays
alldays = DayLocator()              # minor ticks on the days
weekFormatter = DateFormatter('%b %d')  # e.g., Jan 12
dayFormatter = DateFormatter('%d')      # e.g., 12

fig, aux = plt.subplots()
fig.subplots_adjust(bottom=0.2)
aux.xaxis.set_major_locator(mondays)
aux.xaxis.set_minor_locator(alldays)
aux.xaxis.set_major_formatter(weekFormatter)

candlestick_ohlc(aux, zip(mdates.date2num(quotes.index.to_pydatetime()),
                         quotes['open'], quotes['high'],
                         quotes['low'], quotes['close']),
                 width=0.6)

for i in range(len(features_period.date)):
    plt.plot(quotes.index, quotes.close , 'd', color='blue')

aux.xaxis_date()
aux.autoscale_view()
plt.setp(plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
plt.title('USIM5 daily quotes')

plt.rcParams['figure.figsize'] = [10, 10]

display(candlestick_ohlc);

（蓝点被添加到使用/提到的模块创建的图表中。）

问候， fskilnik

于 2019-04-26T15:02:00.990 回答