R help - Apr 2009 - Pulling data into a model

I'm creating an ANOVA model. Is there a way to pull in consecutive columns
of variables for the test?

Example:  aov1<-aov(y~x1+x2+REG[,2:num], data=REG)

I'm not looking for interaction effects, I just want to create a model for
the first few columns of variables (exact number and names will vary) and a few
other predetermined variables (in the example I named them x1 and x2).

Thanks in advance.
- Jacy


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Hi Jacy,

I'll take my chances answering your question.

I'd suggest using the paste() function and then transforming the string 
into a formula object:


my.formula = 
as.formula(paste("y~x1+x2+",paste(colnames(REG)[2:num],collapse="+"),
sep= "")) ;

aov(my.formula,data=REG) ;


The first line creates a string that then becomes your formula statement.

Is this what you're looking for?

Cheers,

Luc

Crosby, Jacy R wrote:
> I'm creating an ANOVA model. Is there a way to pull in consecutive
columns of variables for the test?
>
> Example:  aov1<-aov(y~x1+x2+REG[,2:num], data=REG)
>
> I'm not looking for interaction effects, I just want to create a model
for the first few columns of variables (exact number and names will vary) and a
few other predetermined variables (in the example I named them x1 and x2).
>
> Thanks in advance.
> - Jacy
>
>
> 	[[alternative HTML version deleted]]
>
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