# Mathlab 5/5 part1 ![](https://i.imgur.com/fttusxk.jpg) ## Read File ## Infrastructure ## Sound trainning ## KNN > hyperparemater 調參數 ex 調鄰居數目 modelimportance : 模型中有很多參數(feature),他會決定哪一個比較重要 畫fitctree ![](https://i.imgur.com/9kew5AM.png) feature transformation : pca,factoran