決策樹-分數據集-建模預測選擇決策樹模型-剪枝-qyc

d = read.csv(「train.csv」,header = TRUE) dc= d[complete.cases(d),] #分類數據Y0~3 保持原來Y的分佈，進行平均抽 d0=d[d y = = 0 , ] d 1 = d [ d y==0,] d1=d[d y==0,]d1=d[dy1,] d2=d[d y = = 2 , ] d 3 = d [ d y==2,] d3=d[d y=

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