创建给定特定比例或数字的二进制矩阵

import random

def create_binary_matrix(rows, cols, ratio):
    matrix = []
    total_elements = rows * cols
    num_ones = int(total_elements * ratio)
    num_zeros = total_elements - num_ones
    
    # Generate ones
    for _ in range(num_ones):
        matrix.append(1)
    
    # Generate zeros
    for _ in range(num_zeros):
        matrix.append(0)
    
    # Shuffle the matrix
    random.shuffle(matrix)
    
    # Reshape the matrix
    matrix = [matrix[i:i+cols] for i in range(0, total_elements, cols)]
    
    return matrix

# Example usage
rows = 3
cols = 4
ratio = 0.5

binary_matrix = create_binary_matrix(rows, cols, ratio)
print(binary_matrix)