
Concept explainers
<PROGRAM-DESCRIPTION-ANSWER>
The functions “xlabel()” and “ylabel()” are used to create labels to the axes in the graph.
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Explanation of Solution
Function “xlabel()”:
- • The “xlabel()” function creates a label to the X axis.
- • This function gives a meaningful name to the X axis, so that, the information represented by the X axis will be understood clearly.
- • This function “xlabel()” takes a string as its input parameters.
Syntax:
The “xlabel()” function has the below format.
#Add label to X axis
plt.xlabel(label1)
Explanation:
Here,
- • “xlabel()” is the function that produces a label to the X axis.
- • The variable “label1” is a string that is going to name the X axis.
Example program:
The below example shows how to use the “xlabel()” function in Python,
#Import the files
import matplotlib.pyplot as plt
#Create a list to have the X coordinates of data points
xcoord = [1, 2, 3, 4]
#Create a list to have the Y coordinates of data points
ycoord = [2, 4, 6, 8]
#Call the function
plt.plot(xcoord, ycoord)
#Add label to the X axis
plt.xlabel('X axis')
#Show the graph
plt.show()
Sample Output:
Screenshot of the graph
In the above code,
- • The list “xcoord” represents the X coordinates of all the data points.
- • The list “ycoord” represents the Y coordinates of all the data points.
- • Then, the lists “xcoord” and “ycoord” are passed as input parameters to the “plot()” function to create a line graph.
- • The function “xlabel()” is called to assign the label “X axis” to the X axis.
- • Then, the graph is shown using “show()” function.
Function “ylabel()”:
- • The label to the Y axis is created by the function “ylabel()” ...

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