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- Aula categórica vs quantitativa e quantitativa vs quantitativa
- # local do arquivo
- #https://github.com/DATAUNIRIO/Base_de_dados
- # CARREGAR O BANCO DE DADOS
- load("C:/Users/SEU_ENDERECO/Base_de_dados-master/Base_de_dados-master/CARROS.RData")
- # MANIPULAR AS VARIÁVEIS
- CARROS$TipodeMarcha<-as.factor(CARROS$TipodeMarcha)
- CARROS$Tipodecombustivel<-as.factor(CARROS$Tipodecombustivel)
- levels(CARROS$Tipodecombustivel) <- c('Gasolina','Álcool')
- levels(CARROS$TipodeMarcha) <- c('Automático', 'Manual')
- ###############################################################
- # QUALI vs QUALI
- ###############################################################
- # GERAR A TABELA
- tabela<-table(CARROS$Tipodecombustivel,CARROS$TipodeMarcha)
- tabela
- # GERAR O GRAFICO
- barplot(tabela,
- col=c("red","blue"),
- main = "Tipo de Marcha por tipo de combustível",
- ylim = c(0,15),
- legend.text = rownames(tabela),
- beside=TRUE)
- ##########################################################
- # VARIÁVEL QUALITATIVA Vs VARIÀVEL QUANTITATIVA
- ##########################################################
- names(CARROS)
- boxplot(CARROS$Kmporlitro~CARROS$TipodeMarcha,
- col=c("red","blue"),
- main="Km/l por tipo de marcha")
- par(mfrow=c(1,2))
- boxplot(CARROS$HP~CARROS$Tipodecombustivel,
- col=c("red","blue"),
- main="HP por tipo de combustível")
- boxplot(CARROS$Preco~CARROS$Tipodecombustivel,
- col=c("green","yellow"),
- main="Preço por tipo de combustível")
- par(mfrow=c(1,1))
- library(psych)
- describeBy(CARROS$Kmporlitro,
- CARROS$Tipodecombustivel,
- mat = TRUE)
- describeBy(CARROS$Preco, CARROS$TipodeMarcha, mat = TRUE)
- ##########################################
- # Subconjunto da base de dados
- ##########################################
- CARROS_Gasolina <- subset(CARROS,
- subset=Tipodecombustivel=='Gasolina')
- #####################################################
- # VARIÁVEL QUANTITATIVA Vs VARIÀVEL QUANTITATIVA
- #####################################################
- par(mfrow=c(1,1))
- plot(CARROS$HP,CARROS$Preco,
- col="blue",pch=16,
- xlab = "Horse Power", ylab = "Preço do carro",
- main="Diagrama de dispersão \n do preço por HP")
- abline(lm(CARROS$Preco~CARROS$HP),col="red")
- plot(CARROS$Kmporlitro,CARROS$Preco,
- col="blue",pch=16,
- xlab = "Horse Power", ylab = "Preço do carro",
- main="Diagrama de dispersão \n do preço por HP")
- abline(lm(CARROS$Preco~CARROS$Kmporlitro),col="red")
- MC<-cor(CARROS[,c("HP","Preco","Kmporlitro","Peso","RPM")])
- MC
- library(corrplot)
- corrplot(MC)
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