This is the mailing list for R’s data.table package. Please post on r-help mailing list.
-- Arun On 22 May 2016 at 10:44:29, CRoa ([email protected]) wrote: Hi all, I was wondering if someone could help me designing a contrast matrix when you have a continuous variable (Days). My model looks like this: model<-lme(Y~A*B*Days, data=data_over_time) The factor A has two levels (A1 and A2) and factor B has three levels (B1, B2, and B3). I measured the response variable Y every two or three days over 70 days (Days). I need to look at only a few comparisons over the 70 days such us: A1 and B1 vs A2 and B1, A2 and B2 vs A2 and B1, A1 and B2 vs A2 and B2 I could use the function contrast from the package contrast to design the matrix with the three comparisons mentioned above for specific days at a time. However, I need to run the comparison over the 70 days not at individual time points. I was wondering if someone could help me designing this contrast matrix. Any help would be much appreciated Cheers -- View this message in context: http://r.789695.n4.nabble.com/Contrast-matrix-with-a-continuous-variable-tp4720966.html Sent from the datatable-help mailing list archive at Nabble.com. _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
_______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
