[R] 简单笔记（一）

 1 library(lattice)
 2 
 3 xyplot(Petal.Length~Petal.Width,data=iris,goups = Species)//画分类图
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 7 plot(model,subdata,Petal.Length~Petal.Width)//画模型预测图
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 9 hist(x,col="light blue") //直方图  频率分布
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11 abline(rs,cars)//添加图
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13 factor(因子)  不作为数值参与运算
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15 # Create a vector as input.
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17 data <- c("East","West","East","North","North","East","West","West","West","East","North")
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19 
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21 print(data)
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23 print(is.factor(data))
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25 
26 
27 # Apply the factor function.
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29 factor_data <- factor(data)
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31 
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33 print(factor_data)
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35 print(is.factor(factor_data))
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37 
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39 
40 
41 决策树：
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43 ctree(formula,data)
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45 plot(..)
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47 随机森林
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49 library("randomForest")
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51 randomForest(formula,data)