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2012 Jan 28
1
question on model.matrix
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> I am new to this group - joined today. I am in because i have an assignment to do using R => microarray analysis using affy (bioconductor).
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> while reading some tutorials, i came across this and i am stuck. i want to understand it and would appreciate if anyone can tell me.
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> design <- model.matrix(~ -1+factor(c(1,1,2,2,3,3)))
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> can someone break