自己编程实现的K_means、BP神经网络对Irisic数据分类、4点交比、单个神经细胞的线性分类’以及LOG与Lap的效果比较。并附有代码所使用的irisic的数据-Own programming of K_means, BP neural network Irisic data classification, 4:00 cross-ratio, a single linear classification of nerve cells'　and the comparison of the effects LOG with Lap. Together with the code data used irisic