Python Program to Find Maximum Element of each Row in a Matrix

In the previous article, we have discussed Python Program to Find the Row with Maximum Number of 1s in Matrix

Given a matrix, the task is to find the maximum element of each row for the given matrix in python.

What is a matrix:

A matrix is a rectangular sequence of numbers divided into columns and rows. A matrix element or entry is a number that appears in a matrix.

Example:

Above is the matrix which contains 5 rows and 4 columns and having elements from 1 to 20.

In this order, the dimensions of a matrix indicate the number of rows and columns.

Here as there are 5 rows and 4 columns it is called a 5*4 matrix.

Examples:

Example1:

Input:

Given Matrix : 
1 5 6
11 5 4
9 34 5

Output:

The maximum element of the row { 1 } is : 6
The maximum element of the row { 2 } is : 11
The maximum element of the row { 3 } is : 34

Example2:

Input:

Given Matrix : 
1 6 2
10 14 1
6 9 11

Output:

The maximum element of the row { 1 } is : 6
The maximum element of the row { 2 } is : 14
The maximum element of the row { 3 } is : 11

Program to Find Maximum Element of each Row in a Matrix in Python

Below are the ways to find the maximum element of each row for the given matrix in python:

Using For Loop (Static Input)
Using For loop (User Input)

Method #1: Using For Loop (Static Input)

Approach:

Give the matrix as static input and store it in a variable.
Calculate the number of rows of the given matrix by calculating the length of the nested list using the len() function and store it in a variable mtrxrows.
Calculate the number of columns of the given matrix by calculating the length of the first list in the nested list using the len() function and store it in a variable mtrxcolums.
Take a variable that stores the number of 1’s in the row and initialize it with 0.
Loop till the given number of rows using the For loop.
Calculate the maximum element of the row using the max() function and store it in a variable.
Print the maximum element of the given row.
The Exit of the Program.

Below is the implementation:

# Give the matrix as static input and store it in a variable.
mtrx = [[1, 5, 6], [11, 5, 4], [9, 34, 5]]
# Calculate the number of rows of the given matrix by
# calculating the length of the nested list using the len() function
# and store it in a variable mtrxrows.
mtrxrows = len(mtrx)
# Calculate the number of columns of the given matrix by
# calculating the length of the first list in the nested list
# using the len() function and store it in a variable mtrxcols.
mtrxcols = len(mtrx[0])
# take a variable which stores the number of 1's in the row and initialize it with 0
maxOnes = 0

# Loop till the given number of rows using the For loop.
for p in range(mtrxrows):
    # calculate the maximum element of the row using the max()
    # function and store it in a variable
    maxRowEle = max(mtrx[p])
    # print the maximum element of the given row
    print('The maximum element of the row {', p+1, '} is :', maxRowEle)

Output:

The maximum element of the row { 1 } is : 6
The maximum element of the row { 2 } is : 11
The maximum element of the row { 3 } is : 34

Method #2: Using For loop (User Input)

Approach:

Give the number of rows of the matrix as user input using the int(input()) function and store it in a variable.
Give the number of columns of the matrix as user input using the int(input()) function and store it in another variable.
Take a list and initialize it with an empty value using [] or list() to say gvnmatrix.
Loop till the given number of rows using the For loop
Inside the For loop, Give all the row elements of the given Matrix as a list using the list(),map(),int(),split() functions and store it in a variable.
Add the above row elements list to gvnmatrix using the append() function.
Take a variable that stores the number of 1’s in the row and initialize it with 0.
Loop till the given number of rows using the For loop.
Calculate the maximum element of the row using the max() function and store it in a variable.
Print the maximum element of the given row.
The Exit of the Program.

Below is the implementation:

# Give the number of rows of the matrix as user input using the int(input()) function
# and store it in a variable.
mtrxrows = int(input('Enter some random number of rows of the matrix = '))
# Give the number of columns of the matrix as user input using the int(input()) function
# and store it in another variable.
mtrxcols = int(input('Enter some random number of columns of the matrix = '))
# Take a list and initialize it with an empty value using [] or list() to say gvnmatrix.
mtrx = []
# Loop till the given number of rows using the For loop
for n in range(mtrxrows):
    # Inside the For loop, Give all the row elements of the given Matrix as a list using
    # the list(),map(),int(),split() functions and store it in a variable.
    l = list(map(int, input(
        'Enter {'+str(mtrxcols)+'} elements of row {'+str(n+1)+'} separated by spaces = ').split()))
    # Add the above row elements list to gvnmatrix using the append() function.

    mtrx.append(l)
    

# take a variable which stores the number of 1's in the row and initialize it with 0
maxOnes = 0

# Loop till the given number of rows using the For loop.
for p in range(mtrxrows):
    # calculate the maximum element of the row using the max()
    # function and store it in a variable
    maxRowEle = max(mtrx[p])
    # print the maximum element of the given row
    print('The maximum element of the row {', p+1, '} is :', maxRowEle)

Output:

Enter some random number of rows of the matrix = 3
Enter some random number of columns of the matrix = 3
Enter {3} elements of row {1} separated by spaces = 1 6 2
Enter {3} elements of row {2} separated by spaces = 10 14 1
Enter {3} elements of row {3} separated by spaces = 6 9 11
The maximum element of the row { 1 } is : 6
The maximum element of the row { 2 } is : 14
The maximum element of the row { 3 } is : 11

Find a comprehensive collection of Examples of Python Programs ranging from simple ones to complex ones to guide you throughout your coding journey.