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:
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
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