caption: Homework 1: reproduce this plot with Matlab.
exif: {"Image DocumentName": "Homework 1: reproduce this plot with Matlab.", "Image ImageDescription": "College of Engineering, Peking University \u751f\u7269\u533b\u5b66\u5149\u5b66II.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}