Load Package And Data

load("../../data/craet_3-3.Rdata")
library(tidyverse)
library(caret)

Q: How The Predictors Influence The Y

选择重要的变量: 通过观察在Y的分组下各个变量的分布情况

一般有 箱线图 和 密度图

box-plot

featurePlot(x = trainData[, 1:18], 
            y = trainData$Purchase, 
            plot = "box",#"density"
            strip=strip.custom(par.strip.text=list(cex=.7)),
            scales = list(x = list(relation="free"), 
                          y = list(relation="free")))

Density

featurePlot(x = trainData[, 1:18], 
            y = trainData$Purchase, 
            plot = "density",
            strip=strip.custom(par.strip.text=list(cex=.7)),
            scales = list(x = list(relation="free"), 
                          y = list(relation="free")))

save.image("../../data/craet_4.Rdata")