在matplotlib烛台图表中添加标签

Question

我正在尝试在我用matplotlib生成的烛台图表上添加一个系列（由[1,2,0，....]组成），但无法工作如何在图表中包含每个特定蜡烛的标签。基本上，我想制作一个图表像这样的：

indicators http://www.linnsoft.com/charts/images/TD_Sequential.png

与数字（我的信号系列）刚刚超过或低于每个蜡烛的标签。 有什么办法可以达到？

不知道是否有帮助，但我的系列是大熊猫据帧那种......

Answer 1

这里是源自一个例子 - http://matplotlib.org/examples/pylab_examples/finance_demo.html

请特别注意ax.annotate方法调用下面的代码。

from pylab import * 
from matplotlib.dates import DateFormatter, WeekdayLocator, HourLocator, \ 
    DayLocator, MONDAY 
from matplotlib.finance import quotes_historical_yahoo, candlestick,\ 
    plot_day_summary, candlestick2 

# (Year, month, day) tuples suffice as args for quotes_historical_yahoo 
date1 = (2004, 2, 1) 
date2 = (2004, 4, 12) 


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

quotes = quotes_historical_yahoo('INTC', date1, date2) 
if len(quotes) == 0: 
    raise SystemExit 

fig = figure() 
fig.subplots_adjust(bottom=0.2) 
ax = fig.add_subplot(111) 
ax.xaxis.set_major_locator(mondays) 
ax.xaxis.set_minor_locator(alldays) 
ax.xaxis.set_major_formatter(weekFormatter) 
#ax.xaxis.set_minor_formatter(dayFormatter) 

#plot_day_summary(ax, quotes, ticksize=3) 
candlestick(ax, quotes, width=0.6) 

ax.xaxis_date() 
ax.autoscale_view() 
setp(gca().get_xticklabels(), rotation=45, horizontalalignment='right') 

import datetime 
dt = datetime.datetime(2004, 3, 8) 

# Annotating a specific candle 
ax.annotate('This is my special candle', xy=(dt, 24), xytext=(dt, 25), 
      arrowprops=dict(facecolor='black', shrink=0.05), 
      ) 

show() 

如果您运行此文件得到的情节，应该告诉你： -