使用 matplotlib.finance.candlestick2_ochl 无法显示正日烛台
Failure to display positive day Candlesticks using matplotlib.finance.candlestick2_ochl
我有一个 python 数据框 df 包含日期、开盘价、最高价、最低价、收盘价和交易量值。
我正在尝试绘制一只股票的烛台图。出于某种原因，我似乎无法 matplotlib.finance.candlestick2_ochl() 正确显示收盘价 self.df['closep'] 高于开盘价 self.df['openp'] 的日期。在这些积极的（绿色）日子里，matplotlib 要么显示十字星，要么什么都不显示。
不太清楚为什么我会出现这种行为。我怀疑这与我的程序从我的 Pandas DataFrame self.df.
访问股票数据的方式有关
这是我的代码：
# Visualize my stock data
import pandas as pd
import datetime
import time
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick2_ochl
import matplotlib.ticker as mticker
import matplotlib.dates as mdates
class MyStock:
def __init__(self, stock):
self.stock = stock
self.pullData()
def pullData(self):
try:
print('Currently pulling', self.stock)
print(str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')))
urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + self.stock + '/chartdata;type=quote;range=5d/csv'
self.df = pd.read_csv(urlToVisit, header=None, names=['date', 'closep', 'highp', 'lowp', 'openp', 'volume'],
skiprows=22, dtype=float)
print('Pulled', self.stock, '\n')
except Exception as e:
print('main loop', str(e))
print('Constucting DataFrame\n')
self.df['date'] = pd.to_datetime(self.df['date'], unit='s')
self.df = self.df.set_index('date').tz_localize('UTC').tz_convert('US/Eastern').reset_index()
self.df['date'] = self.df['date'].dt.strftime('%Y-%m-%d %H:%M:%S')
print(self.df.tail())
def CandleStick(self):
self.fig = plt.figure()
ax1 = plt.subplot2grid((6, 4), (1, 0), rowspan=4, colspan=4, axisbg='w')
candlestick2_ochl(ax1, opens=self.df['openp'], closes=self.df['closep'], highs=self.df['highp'], lows=self.df['lowp'], width=.75, colorup='k', colordown='r', alpha=0.75)
plt.ylabel('Stock Price')
ax1.grid(True)
for label in ax1.xaxis.get_ticklabels():
label.set_rotation(90)
plt.subplots_adjust(left=.10, bottom=.19, right=.93, top=.95, wspace=.20, hspace=0)
plt.suptitle(self.stock + ' Stock Price')
plt.show()
amd = MyStock('AMD')
amd.CandleStick()
以及 DataFrame 相关部分旁边的输出屏幕截图：
您可以在此屏幕截图中清楚地看到正天数（绿色）未正确显示。我确定我在这里遗漏了一些非常明显的东西。
感谢任何帮助。
这里有一个错误
我使用的是 Matplotlib 1.5.1，matplotlib 目录中有一个 finance.py 文件，第 1059-1067 行。原代码为：
candlestick2_ohlc(ax, opens, highs, closes, lows, width=width,
colorup=colorup, colordown=colordown,
alpha=alpha)
def candlestick2_ohlc(ax, opens, highs, lows, closes, width=4,
colorup='k', colordown='r',
alpha=0.75,
):
应该是：
（交换参数中'closes'和'lows'的位置）
candlestick2_ohlc(ax, opens, highs, lows, closes, width=width,
colorup=colorup, colordown=colordown,
alpha=alpha)
def candlestick2_ohlc(ax, opens, highs, lows, closes, width=4,
colorup='k', colordown='r',
alpha=0.75,
):
编辑此文件并保存。它应该可以解决您的问题。
Candlestick Chart. sorry for no picture displayed here. you have
to click the url above to see the effect.
在 2 小时内解决了这个问题（现在是 2 a.m。）
就像我在 2 小时前猜测的一样（但不完全是同一个地方），很遗憾人们投票否决了我。
我 2 小时前写的东西。
我在官方Matplotlib API文档中找到了这句话，章节："matplotlib.finance"：
Preserves the original argument order.
这与您的问题有什么关系吗？
其实，我也遇到了和你一样的问题。
fig = plt.figure()
ax1 = plt.subplot(1,1,1)
candlestick(ax1,
opens=test_data.open,
closes=test_data.close,
highs=test_data.high,
lows=test_data.low,
width=1,
colorup='k',
colordown='r',
alpha=0.75)
fig.savefig('index.png',dpi=300,bbox_inches='tight')
我得到了这个：
some wrong chart ploted by me
请查看生成颜色正确的烛台的代码：
import pandas as pd
import datetime
import time
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick2_ochl
import matplotlib.ticker as mticker
import matplotlib.dates as mdates
class MyStock:
def __init__(self, stock):
self.stock = stock
self.pullData()
def pullData(self):
try:
print('Currently pulling', self.stock)
print(str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')))
urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + self.stock + '/chartdata;type=quote;range=2d/csv'
self.df = pd.read_csv(urlToVisit, header=None, names=['date', 'closep', 'highp', 'lowp', 'openp', 'volume'],
skiprows=22, dtype=float)
print('Pulled', self.stock, '\n')
except Exception as e:
print('main loop', str(e))
print('Constucting DataFrame\n')
self.df['date'] = pd.to_datetime(self.df['date'], unit='s')
self.df = self.df.set_index('date').tz_localize('UTC').tz_convert('US/Eastern').reset_index()
self.df['date'] = self.df['date'].dt.strftime('%Y-%m-%d %H:%M:%S')
print(self.df.tail())
def CandleStick(self):
self.fig = plt.figure()
ax1 = plt.subplot2grid((6, 4), (1, 0), rowspan=4, colspan=4, axisbg='w')
candlestick2_ochl(ax1,
self.df['openp'], self.df['highp'], self.df['lowp'], self.df['closep'],
width=.75, colorup='g', colordown='r', alpha=0.75)
plt.ylabel('Stock Price')
ax1.grid(True)
for label in ax1.xaxis.get_ticklabels():
label.set_rotation(90)
plt.subplots_adjust(left=.10, bottom=.19, right=.93, top=.95, wspace=.20, hspace=0)
plt.suptitle(self.stock + ' Stock Price')
plt.show()
amd = MyStock('AMD')
amd.CandleStick()
我有一个 python 数据框 df 包含日期、开盘价、最高价、最低价、收盘价和交易量值。
我正在尝试绘制一只股票的烛台图。出于某种原因，我似乎无法 matplotlib.finance.candlestick2_ochl() 正确显示收盘价 self.df['closep'] 高于开盘价 self.df['openp'] 的日期。在这些积极的（绿色）日子里，matplotlib 要么显示十字星，要么什么都不显示。
不太清楚为什么我会出现这种行为。我怀疑这与我的程序从我的 Pandas DataFrame self.df.
这是我的代码：
# Visualize my stock data
import pandas as pd
import datetime
import time
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick2_ochl
import matplotlib.ticker as mticker
import matplotlib.dates as mdates
class MyStock:
def __init__(self, stock):
self.stock = stock
self.pullData()
def pullData(self):
try:
print('Currently pulling', self.stock)
print(str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')))
urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + self.stock + '/chartdata;type=quote;range=5d/csv'
self.df = pd.read_csv(urlToVisit, header=None, names=['date', 'closep', 'highp', 'lowp', 'openp', 'volume'],
skiprows=22, dtype=float)
print('Pulled', self.stock, '\n')
except Exception as e:
print('main loop', str(e))
print('Constucting DataFrame\n')
self.df['date'] = pd.to_datetime(self.df['date'], unit='s')
self.df = self.df.set_index('date').tz_localize('UTC').tz_convert('US/Eastern').reset_index()
self.df['date'] = self.df['date'].dt.strftime('%Y-%m-%d %H:%M:%S')
print(self.df.tail())
def CandleStick(self):
self.fig = plt.figure()
ax1 = plt.subplot2grid((6, 4), (1, 0), rowspan=4, colspan=4, axisbg='w')
candlestick2_ochl(ax1, opens=self.df['openp'], closes=self.df['closep'], highs=self.df['highp'], lows=self.df['lowp'], width=.75, colorup='k', colordown='r', alpha=0.75)
plt.ylabel('Stock Price')
ax1.grid(True)
for label in ax1.xaxis.get_ticklabels():
label.set_rotation(90)
plt.subplots_adjust(left=.10, bottom=.19, right=.93, top=.95, wspace=.20, hspace=0)
plt.suptitle(self.stock + ' Stock Price')
plt.show()
amd = MyStock('AMD')
amd.CandleStick()
以及 DataFrame 相关部分旁边的输出屏幕截图：
您可以在此屏幕截图中清楚地看到正天数（绿色）未正确显示。我确定我在这里遗漏了一些非常明显的东西。
感谢任何帮助。
这里有一个错误
我使用的是 Matplotlib 1.5.1，matplotlib 目录中有一个 finance.py 文件，第 1059-1067 行。原代码为：
candlestick2_ohlc(ax, opens, highs, closes, lows, width=width,
colorup=colorup, colordown=colordown,
alpha=alpha)
def candlestick2_ohlc(ax, opens, highs, lows, closes, width=4,
colorup='k', colordown='r',
alpha=0.75,
):
应该是：
（交换参数中'closes'和'lows'的位置）
candlestick2_ohlc(ax, opens, highs, lows, closes, width=width,
colorup=colorup, colordown=colordown,
alpha=alpha)
def candlestick2_ohlc(ax, opens, highs, lows, closes, width=4,
colorup='k', colordown='r',
alpha=0.75,
):
编辑此文件并保存。它应该可以解决您的问题。
Candlestick Chart. sorry for no picture displayed here. you have to click the url above to see the effect.
在 2 小时内解决了这个问题（现在是 2 a.m。） 就像我在 2 小时前猜测的一样（但不完全是同一个地方），很遗憾人们投票否决了我。
我 2 小时前写的东西。
我在官方Matplotlib API文档中找到了这句话，章节："matplotlib.finance"：
Preserves the original argument order.
这与您的问题有什么关系吗？
其实，我也遇到了和你一样的问题。
fig = plt.figure()
ax1 = plt.subplot(1,1,1)
candlestick(ax1,
opens=test_data.open,
closes=test_data.close,
highs=test_data.high,
lows=test_data.low,
width=1,
colorup='k',
colordown='r',
alpha=0.75)
fig.savefig('index.png',dpi=300,bbox_inches='tight')
我得到了这个： some wrong chart ploted by me
请查看生成颜色正确的烛台的代码：
import pandas as pd
import datetime
import time
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.finance import candlestick2_ochl
import matplotlib.ticker as mticker
import matplotlib.dates as mdates
class MyStock:
def __init__(self, stock):
self.stock = stock
self.pullData()
def pullData(self):
try:
print('Currently pulling', self.stock)
print(str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')))
urlToVisit = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + self.stock + '/chartdata;type=quote;range=2d/csv'
self.df = pd.read_csv(urlToVisit, header=None, names=['date', 'closep', 'highp', 'lowp', 'openp', 'volume'],
skiprows=22, dtype=float)
print('Pulled', self.stock, '\n')
except Exception as e:
print('main loop', str(e))
print('Constucting DataFrame\n')
self.df['date'] = pd.to_datetime(self.df['date'], unit='s')
self.df = self.df.set_index('date').tz_localize('UTC').tz_convert('US/Eastern').reset_index()
self.df['date'] = self.df['date'].dt.strftime('%Y-%m-%d %H:%M:%S')
print(self.df.tail())
def CandleStick(self):
self.fig = plt.figure()
ax1 = plt.subplot2grid((6, 4), (1, 0), rowspan=4, colspan=4, axisbg='w')
candlestick2_ochl(ax1,
self.df['openp'], self.df['highp'], self.df['lowp'], self.df['closep'],
width=.75, colorup='g', colordown='r', alpha=0.75)
plt.ylabel('Stock Price')
ax1.grid(True)
for label in ax1.xaxis.get_ticklabels():
label.set_rotation(90)
plt.subplots_adjust(left=.10, bottom=.19, right=.93, top=.95, wspace=.20, hspace=0)
plt.suptitle(self.stock + ' Stock Price')
plt.show()
amd = MyStock('AMD')
amd.CandleStick()