I took measures of weight gain during a few weeks, i have two groups, treated and control. So i want to compare diffrence between:

Day1 Tx vs Day 1 Control,  

Day 2 Tx vs Day 2  Control...and so on.

I tried a repeated measure ANOVA, but i get comparisions within groups like this, Day 1 Tx vs Day 2 TX, and thats not what i am looking for. I hope someone can give me some insight on what i can do. Thanks ! 

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