Dear R- helper,

I am trying to analyze repeated measure .

there are three factors: a ,b and time

a and b factors have two levels and time has 90 different timepoints.

This is the r-code I've tried;

gls(y~factor(a)*factor(b)*time, data=, corr=corAR1(form=~time|id))

Here, the reason why I did not put factor code in time factor is that the R
never gave me results and said "no response". So, I took factor code off.

Here is my question.

I am not sure my code is correct and I am wondering if time factor can be
considered as a random factor so that I can use the R-code below.

gls(y~factor(a)*factor(b), data=, corr=corAR1(form=~time|id))

please give me any comments or advice...
Thank you for your help.

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