R语言——实验4-人工神经网络（更新中）

rm(list=ls())
setwd("C:/Users/Administrator/Desktop/R语言与数据挖掘作业/实验4-人工神经网络")

Data=read.csv("sales_data.csv")[,2:5]

library(nnet)
colnames(Data)<-c("x1","x2","x3","y")

model1=nnet(y~.,data=Data,size=6,decay=5e-4,maxit=1000)

pred=predict(model1,Data[,1:3],type="class")
(p=sum(as.numeric(pred==Data$y))/nrow(Data))

table(Data$y,pred)

prop.table(table(Data$y,pred),1)