A title in Matplotlib library describes the main subject of plotting the graphs. Setting a title for just one plot is easy using the title() method. By using this function only the individual title plots can be set but not a single title for all subplots. Hence, to set a single main title for all subplots, suptitle() method is used.
Syntax: suptitle(self, t, **kwargs)
Parameters: This method accept the following parameters that are discussed below:
- t : This parameter is the title text.
- x: This parameter is the x location of the text in figure coordinates.
- y: This parameter is the y location of the text in figure coordinates.
- horizontalalignment, ha : This parameter is the horizontal alignment of the text relative to (x, y).
- verticalalignment, va : This parameter is the vertical alignment of the text relative to (x, y).
- fontsize, size : This parameter is the font size of the text.
- fontweight, weight : This parameter is the font weight of the text.
Returns: This method returns the Text instance of the title.
Setting a Single Title for All the Subplots
Example 1:
In this example, we will import the required library and create a 2*2 plot. We are creating random data by using random.randint to plot our graph and then setting a single title for all the subplots.
Python3
# importing packagesimport matplotlib.pyplot as pltimport numpy as np# making subplots objectsfig, ax = plt.subplots(2, 2)# draw graphax[0][0].plot(np.random.randint(0, 5, 5), np.random.randint(0, 5, 5))ax[0][1].plot(np.random.randint(0, 5, 5), np.random.randint(0, 5, 5))ax[1][0].plot(np.random.randint(0, 5, 5), np.random.randint(0, 5, 5))ax[1][1].plot(np.random.randint(0, 5, 5), np.random.randint(0, 5, 5))fig.suptitle(' Set a Single Main Title for All the Subplots ', fontsize=30)plt.show() |
Output:
Example 2:
Here, we are creating data to plot our graph and using a marker.
Python3
import matplotlib.pyplot as pltimport numpy as npfig, (ax1, ax2) = plt.subplots(1, 2, figsize=(12, 5))x1 = [1, 2, 3, 4, 5, 6]y1 = [45, 34, 30, 45, 50, 38]y2 = [36, 28, 30, 40, 38, 48]labels = ["student 1", "student 2"]# Add title to subplotfig.suptitle(' Student marks in different subjects ', fontsize=30)# Creating the sub-plots.l1 = ax1.plot(x1, y1, 'o-', color='g')l2 = ax2.plot(x1, y2, 'o-')fig.legend([l1, l2], labels=labels, loc="upper right")plt.subplots_adjust(right=0.9)plt.show() |
Output:
