# 3 examples of 'find the maximum element in a matrix using functions python' in Python

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``73def findMax(rows):74    for row in range(len(rows)-1, 0, -1):75        # print("row=",row)76        for col in range(0,row):77            # print(rows[row][col],rows[row][col+1])78            rows[row-1][col] += max(rows[row][col],rows[row][col+1])79            print(rows[row-1][col])80        print("\n")81    return rows``
``11def leftmost_min_element_divide_and_conquer(12        matrix, leftmost_min_element_in_each_row, row_start, row_end, step):13    if row_start == row_end:14        leftmost_min_element_in_each_row[row_start] = \15            find_leftmost_min_element_in_row(16                matrix, row_start, 0, len(matrix[row_start]) - 1)17    else:18        # Construct a submatrix consisting of the even-numbered rows19        sub_matrix_row_start = row_start + step20        sub_matrix_row_end = 02122        if row_end % 2 == 0 or ((row_end - row_start) // step) % 2 == 0:23            sub_matrix_row_end = row_end - step24        elif ((row_end - row_start) // step) % 2 == 1:25            sub_matrix_row_end = row_end2627        leftmost_min_element_divide_and_conquer(28            matrix, leftmost_min_element_in_each_row,29            sub_matrix_row_start, sub_matrix_row_end, step * 2)3031        leftmost_min_element_in_odd_numbered_rows(32            matrix, leftmost_min_element_in_each_row, row_start, row_end, step)``
``199def matrix_elem(matrix, i, j, val=None):200  """201  Reads/writes the elements of an affine transform.202203  1. 3x3 rotational component;204      matrix_elem(m, i, j) for i=0..3, j=0..3205  2. 3x1 translational component:206      matrix_elem(m, 3, i) for i=0..3)207  """208  k = i*3 + j209  if val is None:210    return matrix[k]211  else:212    matrix[k] = val213    return val``