[R] Problem with col

[Sonia Amin]

Sorry Sarah  for my basic question: what does "a column was read as factor"
mean?

When I type data , I obtain all the numeric values and the headears  I
added (Consommation,Cylindre,Puissance,Poids)

Thanks



2015-04-20 18:40 GMT+02:00 Sarah Goslee <sarah.goslee at gmail.com>:

> What is the problem? One or more of your columns was read as factor, as
>
> str(data)
>
> would show you. To avoid this, you can add stringsAsFactors=FALSE to
> the read.table command, but if you expect your data to be entirely
> numeric then there's something wrong with it that you need to hunt
> down.
>
> Sarah
>
> On Mon, Apr 20, 2015 at 12:33 PM, Sonia Amin <soniaamin5 at gmail.com> wrote:
> > 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
> >
> --
> Sarah Goslee
> http://www.functionaldiversity.org
>

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