Chapter 7.10, Problem 30CP

Explanation of Solution

Function “xticks()”:

• • Function “xticks()” displays the customized tick mark labels along the X axis.
• • This function sets the X limits of the current location with the tick label.

Syntax:

The “xticks()” function has the below format.

#Customize the tick marks along the X axis

plt.xticks(locations, labels)

Explanation:

Here,

• • “xticks()” is the function that customizes the tick marks along the X axis.
• • The variables “locations” and “labels” are one-dimensional list that specifies the tick mark locations and its corresponding labels.

Example program:

The below example shows how to use the “xticks()” function in Python.

#Import the files

import matplotlib.pyplot as plt

#Function definition

def main():

         #Define the left edges

         leftedges=[0,10,20,30,40]

         #Define the heights

         heights=[500,800,645,700,900]

         #Create a bar chart

         plt.bar(leftedges, heights,5)  

         #Create X axis label

         plt.xlabel('Year')

         #Create Y axis label

         plt.ylabel('Profit')

         #Create X axis ticks

         plt.xticks([0,10,20,30,40],

         ['2010','2011','2012','2013','2014'])

         #Show the graph

         plt.show()

#Call the function

main()

In the above code,

• • Define the function “main()”. Inside the function,
  • ○ Create two lists to store the left edges and heights of all the bars.
  • ○ Then create labels for the X and Y axes.
  • ○ The function “xticks()” places the tick marks in the X axis at locations “0, 10, 20, 30,and 40” with the labels “2010, 2011, 2012, 2013, and 2014”, respectively.

Output:

Screenshot of the bar chart using the function “xticks()”

Function “yticks()”:

• • The function “yticks()” in Python enables the user to customize the tick marks labels along the Y axis.
• • This function sets the Y limits of the current location with the given tick label.

Syntax:

The “yticks()” function has the below format.

#Customize the tick marks along the Y axis

plt...