Python – Check Similar elements in Matrix rows

When it is required to check for similar elements in a matrix row, a method is defined that take a matrix as parameter. The map method is used to covert the matrix to a tuple. The matrix values are iterated over and if the frequency is greater than 1, it is displayed on the console.

Example

Below is a demonstration of the same

from collections import Counter
def find_dupes(my_matrix):
   my_matrix = map(tuple,my_matrix)

   freq_dict = Counter(my_matrix)

   for (row,freq) in freq_dict.items():
      if freq>1:
         print (row)

my_matrix = [[1, 1, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1], [1, 0, 1, 1, 0, 0],
         [1, 1, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1], [0, 0, 1, 0, 0, 1]]
print("The matrix is :")
print(my_matrix)

print("The result is :")
find_dupes(my_matrix)

Output

The matrix is :
[[1, 1, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1], [1, 0, 1, 1, 0, 0], [1, 1, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1], [0, 0, 1, 0, 0, 1]]
The result is :
(1, 1, 0, 1, 0, 1)
(0, 0, 1, 0, 0, 1)

Explanation

• The required packages are imported.

• A method named ‘find_dupes’ is defined that takes a matrix as a parameter.

• The ‘map’ method is used to convert the matrix to a tuple.

• The counter method is used to get the count of every value in the matrix.

• This is stored in a dictionary.

• The dictionary items are iterated over.

• If the frequency of any element is greater than 1, it is displayed on the console.

• Outside the method, a matrix (technically a list of list) is defined and is displayed on the console.

• The method is called by passing the required parameter.

• The result is displayed on the console.