下图两组1.2.3可以对应起来;
参考资料:
1. Matlab
https://www.bilibili.com/video/BV1bR4y1Z7Xg/?spm_id_from=333.1296.top_right_bar_window_history.content.click&vd_source=5556680656536651c49f5e55d7d4df23
2.
https://www.bilibili.com/video/BV1oW411q7bv/?spm_id_from=333.337.search-card.all.click&vd_source=5556680656536651c49f5e55d7d4df23