标签:val 中学 ram img algo ber tin called sed
1 KNN 进行分类基于什么 ?
F(x)=
2 k in KNN is a parameter that refer to the number of nearest neighbors to include in the majority voting process
k在KNN中是一个参数,指的是在多数表决过程中要包括的最近的邻居的数量
3 KNN Algorithm is based on feature similarity:choosing the right value of k is a process called parameter tuning, and is important for better accuracy
KNN算法是基于特征相似度的:选择正确的k值是一个称为参数整定的过程,对提高精度非常重要
parameter tuning 参数调优
4 when do we use KNN Algorithm? 我们什么时候使用KNN算法?
we can use knn when {date is labled;data is noise free ;data is small}
对于数据集小的解释是:because KNN is a lazy learner ,so doesn‘t learn a discriminative function from the traing set (因为KNN是一个懒惰的学习者,所以不会从训练集中学习判别函数.对于小的数据集,KNN 是非常好的
)
5 How does KNN Algorithm work?
标签:val 中学 ram img algo ber tin called sed
原文地址:https://www.cnblogs.com/MINGYOUR/p/11819348.html