转置矩阵有什么问题

Question

def main():


def transposed(matrix):

    newMatrix = []
    row = []
    for j in range(len(matrix[0])):
        for i in range(len(matrix):
            row.append(matrix[i][j])
        newMatrix.append(row)

    return newMatrix


main()

#When I run this code with e.g. matrix = [[1,2,3], [4,5,6], [7,8,9]] 
#the output is [[1, 4, 7, 2, 5, 8, 3, 6, 9], 
#[1, 4, 7, 2, 5, 8, 3, 6, 9], [1, 4, 7, 2, 5, 8, 3, 6, 9]]

所以，当我运行这段代码时，我得到一个完全错误的转置矩阵。我认为问题在于排除但我不知道自己做错了什么。

Answer 1

您没有创建新行。有效的代码：

def main():


def transposed(matrix):

    newMatrix = []
    for j in range(len(matrix[0])):
        row = []
        for i in range(len(matrix):
            row.append(matrix[i][j])
        newMatrix.append(row)

    return newMatrix


main()