How to create labels on x and y axis of matplotlib diagram ?

From previous post () the minimum working example will be used.

import numpy as np

import matplotlib.pyplot as plt

x=np.arange(0,20.01, 0.01)

y = np.sin(x)

plt.figure()

plt.plot(x,y)

plt.show()

The command for creating the labels (names) of x and y axis is to write following commands.

plt.xlabel()

plt.ylabel()

By writing this two commands in the python script the python would return TypeError: xlabel() missing 1 required positional argument: 'xlabel' during execution since the label name is missing inside the xlabel brackets.

To give x and y axis label names write the following commands just before the plt.show().

plt.xlabel(‘x’)

plt.ylabel(‘y’)

After the python script exection you should see the label names of x and y axis as shown in the following figure.

Figure 1 – The result of minimum working example with x and y labels

Matplotlib also has the ability to create label names as mathematical expression. This is done by putting the dollar sings before and after the mathematical expression (‘$...$’). For example let’s create x and y labels as mathematical expressions where y will be written as ‘$sin(x)$’

plt.xlabel(‘$x$’)

plt.ylabel(‘$sin(x)$’)

The previous two lines are placed just before plt.show(). The result is shown in the following figure.

Figure 2 – The result of minimum working example with x and y labels written in the form of mathematical expression.

At the end the python code of minimum working example used in this tutorial.

import matplotlib.pyplot as plt

import numpy as np

x = np.arange(0,20.01,0.01)

y = np.sin(x)

plt.figure()

plt.plot(x,y)

plt.xlabel("$x$")

plt.ylabel("$sin(x)$")

plt.show()