Question

Common reference design and intercept in limma

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Sean Davis 21k

@sean-davis-490

Last seen 5 months ago

United States

I have a common reference design with a couple of factors. I was planning on using model.matrix to set up the design matrix. Do I need to use an intercept term when using model.matrix? Thanks, Sean

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ADD COMMENT • link updated 20.5 years ago by Gordon Smyth 52k • written 20.5 years ago by Sean Davis 21k

score 0 · Answer 1 · 2004-09-01

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Gordon Smyth 52k

@gordon-smyth

Last seen 8 hours ago

WEHI, Melbourne, Australia

> I have a common reference design with a couple of factors. I was > planning on using model.matrix to set up the design matrix. Do I need > to use an intercept term when using model.matrix? Makes no difference. You can do it either way. Gordon > Thanks, > Sean

ADD COMMENT • link 20.5 years ago Gordon Smyth 52k