[R] Problem with col

[Sonia Amin]

Dear All,

I have written the following lines:

 data<-read.table("C:\\Users\\intel\\Documents\\SIIID\\datamultiplereg.txt",header
= FALSE, sep = "")
 colnames(data)<-c("Consommation","Cylindre","Puissance","Poids")
 result.model1<-lm(Consommation~Cylindre+Puissance+Poids, data=data)
summary(result.model1)

I obtained the following message:


Call:
lm(formula = Consommation ~ Cylindre + Puissance + Poids, data = data)

Residuals:
Error in quantile.default(resid) : factors are not allowed
In addition: warning message:
In Ops.factor(r, 2) :
  ‘^’ This is not relevant for factors


Where is the problem?
Thank you in advance

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