如果行名不在列表R中，则将行添加到矩阵中

# 假设矩阵matrix和列表R已经定义
matrix = [[1, 2, 3],
          [4, 5, 6],
          [7, 8, 9]]

R = ['row1', 'row2']

# 假设要添加的行为['row3', 10, 11, 12]
new_row = ['row3', 10, 11, 12]

# 检查行名是否在列表R中
if new_row[0] not in R:
    # 将行添加到矩阵中
    matrix.append(new_row)

# 打印更新后的矩阵
for row in matrix:
    print(row)

[1, 2, 3]
[4, 5, 6]
[7, 8, 9]
['row3', 10, 11, 12]