Hi all, I have data from two groups : young and old. I know that young group should be stable ,and therefor, the bach effects can easily be removed. The old group,on the other hand, may not be stable between the batches.

Thus, I would like to use the "pure" bach correction from the young group to ajust the old group data How can it be done?

Thanks, yishai Pickman. Faculty of Medicine and Faculty of Biology, Technion