[R] vaiable in lm

[Uwe Ligges]

On 21.05.2010 09:54, Yuan Jian wrote:
> Hi,
>
> if I know the colnames x and y in the following example, I can easily to do lm.
> tmp<- data.frame(x=c(1,1.2),y=c(1,2))
> lm(y ~ x, data=tmp)
>
> when the colnames are variable, what should I do? for example
> colnames(tmp)[1]<- paste("aa",1,sep="_")
> lm(y ~ paste("aa",1,sep="_"), data = tmp)


myformula <- formula(paste("y ~", paste("aa", 1, sep="_")))
lm(myformula, data = tmp)


Uwe Ligges



> it gives me error.
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