Dear Stan user:
I would like to know whether my stan model and distribution are fitted properly.
Is there any index I could check(like n_eff,Rhat…) without thousands of iterations?(because many of iterations take a long time)

I use pystan.And I would like to predict the stiffness of tumor by “pressing depth”,“force curve” and “tumor morphology”. The image below is the model I assign.

the other suggestion is to choose what you think are reasonable values for your parameters, generate some data using those values, fit the model to the simulated data, and check the estimates for the parameters. more details here:

One more question,after finishing all of this chek(Tree Depth, E-BFMI).Only the divergence is not small enough.
Do I have to restart iterate again(Like the following link)?