What is Matplotlib?
Matplotlib is one of the most popular Python packages used for data visualization. It is a cross-platform library for making 2D plots from data in arrays. It provides an object-oriented API that helps in embedding plots in applications using Python GUI toolkits such as PyQt, WxPythonotTkinter. It can be used in Python and IPython shells, Jupyter notebook and web application servers also.
Matplotlib is often used along with package like NumPy.
Install Matplotlib
pip install matplotlib
Import Matplotlib
import matplotlib.pyplot as plt
Create Title
plt.title("Name")
Create X and Y Labels
plt.xlabel('Name')
plt.ylabel('Name')
plt.xlabel('Name', color='red')
plt.ylabel('Name', color='#ff0000')
Create Plot
plt.plot()
plt.plot(name_x, name_y)
plt.plot(name_x, name_y, color='#ff0000')
plt.plot(name_x, name_y, color='#ff0000', linestyle='--')
plt.plot(name_x, name_y, color='#ff0000', linestyle='--', label="Name")
Add Labels in Plot
plt.legend()
Show Plot
plt.show()
Save Plot In Image
plt.savefig('name.png')
plt.savefig('name.png', transparent = True) # Transparent Figure
Close And Clear
plt.cla() # Clear an axis
plt.clf() # Clear the entire figure
plt.close() # Close a window
Examples:
Example 1:
import matplotlib.pyplot as plt
years_x = [2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018]
greece_y = [8.4,7.8,9.6,12.7,17.9,24.5,27.5,26.5,24.9,23.6,21.5,19.3]
europe_y = [7.2,7,9,9.6,9.7,10.5,10.9,10.2,9.4,8.6,7.6,6.8]
plt.title("Comparison of Unemployment")
plt.plot(years_x, greece_y, color='#ff0000', label="Greece")
plt.plot(years_x, europe_y, color='#00ff00', label="Europe", linestyle='--')
plt.xlabel('Years', color='#ff0000')
plt.ylabel('Percentage %', color='#ff0000')
plt.savefig('plot.png')
plt.legend()
plt.show()
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