Please delete

Please Delete.

This isn’t right.

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Oh wow, I didn’t even notice! Thanks for the assistance.

Unfortunately, now I’m getting this error:

SAMPLING FOR MODEL ‘stan-eae944679c1d’ NOW (CHAIN 1).
Rejecting initial value:
Gradient evaluated at the initial value is not finite.
Stan can’t start sampling from this initial value.
Rejecting initial value:
Gradient evaluated at the initial value is not finite.
Stan can’t start sampling from this initial value.
Rejecting initial value:
Gradient evaluated at the initial value is not finite.
Stan can’t start sampling from this initial value.
Rejecting initial value:
Gradient evaluated at the initial value is not finite.
Stan can’t start sampling from this initial value.
Rejecting initial value:
Gradient evaluated at the initial value is not finite.
Stan can’t start sampling from this initial value.

Many times over.

You could try normal(0,1) priors, sigma can just be declared real<lower=0> and maybe could use a prior,

Ok, I’m going to try and approach this problem from totally different angle. Please delete this post. Thank you for the assistance.