Matplotlib is a library in Python. It is a mathematical extension of the Numpy Library. It is a comprehensive library for creating static, animated, and interactive visualizations in Python. Pyplot is a state-based interface to a Matplotlib module. The Pyplot can create many types of plots such as line graphs, bar graphs, histograms, etc. The cla(), clf() and close() are different methods and functions of Matplotlib.
What is cla() in Matplotlib
This cla()method in the Pyplot module of the Matplotlib library is used to clear the current axes.
Example:
Python3
import numpy as npimport matplotlib.pyplot as pltt = np.linspace(0.0, 2.0, 401)s = np.sin(2 * np.pi * t)fig, [ax, ax1] = plt.subplots(2, 1)ax.set_ylabel('y-axis')ax.plot(t, s)ax.grid(True)ax1.set_ylabel('y-axis')ax1.set_xlabel('x-axis')ax1.plot(t, s)ax1.grid(True)# Function callax1.cla()fig.suptitle('matplotlib.pyplot.cla Example')plt.show() |
Output:
The subplot ax1 content is cleared.
What is clf() in Matplotlib
The clf() method in the Pyplot module of the Matplotlib library is used to clear the entire current figure. It even clears the subplot. It leaves the window space open so that it can be reused by other plots.
Example:
Python3
import numpy as npimport matplotlib.pyplot as pltt = np.linspace(0.0, 2.0, 201)s = np.sin(2 * np.pi * t)fig, [ax, ax1] = plt.subplots(2, 1)ax.set_ylabel('y-axis')ax.plot(t, s)ax.grid(True)ax1.set_ylabel('y-axis')ax1.set_xlabel('x-axis')ax1.plot(t, s)ax1.grid(True)# Func. callplt.clf()fig.suptitle('matplotlib.pyplot.clf Example')plt.show() |
Output:
The clf() function cleared the entire figure and only space is left.
What is close() Matplotlib
The close() method in the Pyplot module of the Matplotlib library is used to close the window of the plot. By default, it closes the current window. Since the window is closed there will no output in this method.
Example:
Python3
import numpy as npimport matplotlib.pyplot as pltt = np.linspace(0.0, 2.0, 201)s = np.sin(2 * np.pi * t)fig, [ax, ax1] = plt.subplots(2, 1)ax.set_ylabel('y-axis')ax.plot(t, s)ax.grid(True)ax1.set_ylabel('y-axis')ax1.set_xlabel('x-axis')ax1.plot(t, s)ax1.grid(True)# Function callplt.close()fig.suptitle('matplotlib.pyplot.close Example')plt.show() |
Difference Between cla() vs. clf() vs. close()
| cla() | clf() | close() |
|---|---|---|
| Used to clear the current axes | Used to clear the entire current figure | Used to close the window of the plot |
| It only clears the currently active plot | Leaves the window space open so that it can be reused by other plots | Terminates the plot completely |
| Doesn’t affect any other subplot | It even clears the subplot. | Closes the plots entirely |
