我正在绘制一个蜡烛图(OHLC+成交量),不幸的是我无法找出如何以日期时间格式显示日期。尝试了几种方法都没有成功。
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick_ohlc
from matplotlib import style
import pandas as pd
style.use('classic')
def graph(candlestick_list):
df = pd.DataFrame(candlestick_list)
ohlc = df[['date', 'open', 'high', 'low', 'close']]
ax1 = plt.subplot2grid((6,1), (0,0), rowspan=5, colspan=1)
ax2 = plt.subplot2grid((6,1), (5,0), rowspan=5, colspan=1, sharex=ax1)
candlestick_ohlc(ax1, ohlc.values, width=0.5, colorup='g', colordown='r')
ax2.bar(df['date'], df['volume'])
plt.show()
不幸的是,以下方法对我没有起作用:
df['date'] = pd.to_datetime(df['date'], unit='s')
TypeError:对于“ -”不支持操作数类型:“Timestamp”和“ float”
或者这个:
import matplotlib.dates as mdates
ax1.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))
ValueError: 年份 4095909 超出范围
有人有什么想法吗? 提前感谢您!
PS:以下列表可用于测试代码
candlestick_list = [{'date': 1496332800, 'high': 215.3209, 'low': 200.3, 'open': 211.18, 'close': 206.47999999, 'volume': 2432435.9201853, 'quoteVolume': 11813.26856836, 'weightedAverage': 205.90710404}, {'date': 1496340000, 'high': 212.0001, 'low': 205.75400533, 'open': 206.47999992, 'close': 207.85, 'volume': 1301024.6514137, 'quoteVolume': 6250.47612412, 'weightedAverage': 208.14808753}, {'date': 1496347200, 'high': 212.44999999, 'low': 206.9813717, 'open': 208.49981874, 'close': 209.99811003, 'volume': 1062083.1773221, 'quoteVolume': 5056.26107738, 'weightedAverage': 210.05307302}, {'date': 1496354400, 'high': 213.20999999, 'low': 209.61231001, 'open': 210, 'close': 211.44, 'volume': 705968.23009208, 'quoteVolume': 3335.35026592, 'weightedAverage': 211.66239639}, {'date': 1496361600, 'high': 219, 'low': 210.81410968, 'open': 211.43999994, 'close': 215.41715998, 'volume': 972040.25543603, 'quoteVolume': 4500.001815, 'weightedAverage': 216.00885852}]
df['date'] = pd.to_datetime(df['date'], unit='s')
运行良好,它可以正确更改您的列数据类型。至于其他行,我不知道 mdates 或 mticker 是什么,所以无法检查 ^^' - Rayhane Mamadf['date'] = pd.to_datetime(df['date'], unit='s')
对我也适用。 - Nipun BatraPython 3.6
、matplotlib 2.0.2
、pandas 0.18.1
,你呢? - sunwarr10r