[英]Python, connect two data points at the beginning and end of a series
我真的很想知道如何使用Python在图表上绘制两个点的均值。 我有200个数据点的股票数据,我想取前20个点的均值和后20个点的均值,然后绘制一条连接这两个点的线。 我不希望考虑这两个之间的任何数据点。
我的整个程序就是这样
stock = web.get_data_yahoo('clh.ax', '10/01/2017', interval='d')
stock['ema']=stock['Adj Close'].ewm(span=100,min_periods=0).mean()
stock['std']=stock['Adj Close'].rolling(window = 20,min_periods=0).std()
# bollinger bands
stock['close 20 day mean'] = stock['Close'].rolling(20,min_periods=0).mean()
# upper band
stock['upper'] = stock['close 20 day mean'] + 2 * (stock['Close'].rolling(20, min_periods=0).std())
# lower band
stock['lower'] = stock['close 20 day mean'] - 2 * (stock['Close'].rolling(20, min_periods=0).std())
# end bollinger bands
fig,axes = plt.subplots(nrows=3, ncols =1, figsize=(10,6))
axes[0].plot(stock['Close'], color='red')
axes[0].plot(stock['ema'], color='blue')
axes[0].plot(stock['close 20 day mean'], color='black')
axes[0].plot(stock['upper'], color='black')
axes[0].plot(stock['lower'], color='black')
axes[1].plot(stock['Volume'],color='purple')
axes[2].plot(stock['std'], color='black')
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