[R-sig-ME] Set two coefficients to be equal in lme()

[Simon Harmel]

Dear All,

I was wondering if it might be possible in my below model to set
"D1:Treat" and "D2:Treat" to be equal?

lme(value ~ 0 + D1 + D2 + D1:Treat + D2:Treat, random = ~0 + D1 + D2 |
Student, data = data)

Thank you,
Simon

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