Python 逆转矩阵

最新推荐文章于 2023-03-30 18:44:21 发布

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最新推荐文章于 2023-03-30 18:44:21 发布

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分类专栏：笔记文章标签： python 矩阵

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逆转矩阵

l = [[1,2,3],[4,5,6],[7,8,9]]

def rotate(matrix):
    # 逆时针旋转矩阵
    row = len(matrix)
    col = len(matrix[0])
    # 存放旋转后的矩阵
    new_matrix = []
    # 行列调换
    for i in range(col):
        new_line = []
        for j in range(row):
            new_line.append(matrix[j][col - 1 - i])
        new_matrix.append(new_line)
    return new_matrix

print(rotate(l))

顺时针打印矩阵

# coding:utf-8

class Solution(object):
    def printMatrix(self, matrix):
        # 打印矩阵
        result = []
        while matrix:
            result += matrix.pop(0)
            if matrix:
                matrix = self.rotate(matrix)
        return result

    def rotate(self, matrix):
        # 逆时针旋转矩阵
        row = len(matrix)
        col = len(matrix[0])
        # 存放旋转后的矩阵
        new_matrix = []
        # 行列调换
        for i in range(col):
            new_line = []
            for j in range(row):
                new_line.append(matrix[j][col-1-i])
            new_matrix.append(new_line)
        return new_matrix

if __name__ == '__main__':
    # 测试代码
    matrix = [
        [1,2,3,4],
        [5,6,7,8],
        [9,10,11,12],
        [13,14,15,16]
    ]
    solution = Solution()
    result = solution.printMatrix(matrix)
    print(result)