Hello, I have a programming problem that has me stumped, and it's a bit embarrassing because in theory it seems so simple. I have a data set of mouse activity in a behavior test. There are multiple types of mice, that received one of four combinations of treatments. I've been able to compare the mice according to their type and treatment with code like this: proc sort; by treat; proc glm; by treat; class line; model s1-s3 = line / nouni; repeated s; means line / tukey; means line; run; In this example, I can compare my mouse strains ("line") within each treatment condition ("treat"), in each stage of a 3-stage test ("s1-s3"). For example, I could say that mouse line B spent more time in some particular zone than mouse line A in stage 2. This is all well and good, but I would also like to be able to compare between stages. In other words, I need to see if there are any significant changes in performance from stage 1 to stage 2 to stage 3 within each line and/or treatment condition. For example, did mouse line A show a significant difference in time spent in some particular zone between stage 1 and 2? What about between stage 2 and 3? These are the questions I need to answer. I've exhausted my creativity trying to rewrite my code to generate these stage comparisons, but it's a nut I can't seem to crack. If anyone could offer some insight or some useful resources, it be very helpful!
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