Please Delete.

This isn’t right.

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.