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# [867. Transpose Matrix](https://leetcode.com/problems/transpose-matrix/)
## 题目
Given a matrix `A`, return the transpose of `A`.
The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix.
**Example 1:**
Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]
**Example 2:**
Input: [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
**Note:**
1. `1 <= A.length <= 1000`
2. `1 <= A[0].length <= 1000`
## 题目大意
给定一个矩阵 A 返回 A 的转置矩阵。矩阵的转置是指将矩阵的主对角线翻转,交换矩阵的行索引与列索引。
## 解题思路
- 给出一个矩阵,顺时针旋转 90°
- 解题思路很简单,直接模拟即可。