Dear Prof Smith, dear Bioconductor's user,

I am using Limma to analyse time series microarray gene expression data. I
have 4 time points (t1: 40 RNAs, t2:42, t3:20,t4:30). RNAs are isolated from
42 patients.
could you tell me how can I set the design matrix, there is no replicates
and it is only one condition which is compared over time (i.e there is no
treatment factor).


Thank you for your help,
Claire P

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