matplotlib example matplotlib ohlc (snippet)

Python matplotlib example 'matplotlib ohlc'

Modules used in program:

• import matplotlib.dates as dates
• import matplotlib.ticker as mticker
• import matplotlib.dates as mdates
• import numpy as np
• import pandas as pd

python matplotlib ohlc

Python matplotlib example: matplotlib ohlc

# This code was adapted from Harrison Kinsley's tutorial
# Source: https://pythonprogramming.net/candlestick-ohlc-graph-matplotlib-tutorial/

# Import the necessary libraries
import pandas as pd
import numpy as np

from matplotlib import pyplot as plt
import matplotlib.dates as mdates
import matplotlib.ticker as mticker

# from matplotlib.finance import candlestick_ohlc
from mpl_finance import candlestick_ohlc

from matplotlib.pyplot import figure
%matplotlib inline

# Read in S&P 500 and Campbell Soup Company Data
cpb = pd.read_csv('supporting_files/CPB.csv')

# Make a copy of the data frame before converting the date
# column to Matplotlib's format
cpb_mpl = cpb.copy()

# Convert Date column to Matplotlib's float format
import matplotlib.dates as dates
cpb_mpl.Date = dates.datestr2num(cpb_mpl.Date)

# Create a list of lists where each inner-list represents
# one day's trading history
cpb_subset = cpb_mpl[['Date', 'Open', 'High', 'Low', 'Close', 'Volume']]
cpb_list = [list(x) for x in cpb_subset.values]

# Build the plot
fig = plt.figure(figsize=(16,8))
ax1 = plt.subplot2grid((1,1), (0,0))

candlestick_ohlc(ax1, cpb_list, width=0.4, colorup='#77d879', colordown='#db3f3f')

for label in ax1.xaxis.get_ticklabels():
     label.set_rotation(45)

ax1.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))
ax1.xaxis.set_major_locator(mticker.MaxNLocator(10))
ax1.grid(True)

plt.xlabel('Date')
plt.ylabel('Price')
plt.title('Campbell Soup Company')
plt.subplots_adjust(left=0.09, bottom=0.20, right=0.94, top=0.90, wspace=0.2, hspace=0)
plt.show()

Python links

• Learn Python: https://pythonbasics.org/
• Python Tutorial: https://pythonprogramminglanguage.com