适用于对模式识别感兴趣的同学，是K近邻的MATLAB源码，希望对你有帮助，这个代码可以直接运行，你可以更改自己感兴趣的参数。(For students who are interested in pattern recognition, they are MATLAB codes for K nearest neighbors. I hope they can help you. This code can run directly, you can change the parameters you are interested in.)