Re: [R] interaction effects in a Linear model
On 11/23/2009 1:06 AM, ashok varma wrote: hello, i am fitting a Linear model using R. I have to fit the model considering all the interaction effects of order 1 of the independent variables. But I have 9 variables. So, it will be difficult for me to write all the 36 combinations in the model. Can anyone please help how to get this done in much smarter way?? This will include all main effects and two-way interactions: lm(Y ~ (A + B + C + D + E + F + G + H + I)^2, data=mydata) thanks a lot, Ashok Varma. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] interaction effects in a Linear model
Hi Cleland and Dennis, thanks a lot for the answer. Ashok Varma On Mon, Nov 23, 2009 at 5:05 PM, Chuck Cleland cclel...@optonline.netwrote: On 11/23/2009 1:06 AM, ashok varma wrote: hello, i am fitting a Linear model using R. I have to fit the model considering all the interaction effects of order 1 of the independent variables. But I have 9 variables. So, it will be difficult for me to write all the 36 combinations in the model. Can anyone please help how to get this done in much smarter way?? This will include all main effects and two-way interactions: lm(Y ~ (A + B + C + D + E + F + G + H + I)^2, data=mydata) thanks a lot, Ashok Varma. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] interaction effects in a Linear model
hello, i am fitting a Linear model using R. I have to fit the model considering all the interaction effects of order 1 of the independent variables. But I have 9 variables. So, it will be difficult for me to write all the 36 combinations in the model. Can anyone please help how to get this done in much smarter way?? thanks a lot, Ashok Varma. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
