truncated normal distribution in rstan

[Ru Wang]

In my model, one prior is truncated  N(0,100), the parameter should be greater than 0, so the prior in the model block should be 

beta~normal(0,100)T[0,].

Can anyone tell me if this is right. Any help is appreciated. 

[Daniel Lee]

That's incorrect.

In the parameter's block, declare beta as:

  real<lower = 0> beta;

In the model block, you can now use:

  beta ~ normal(0, 100);

If you really wanted to, you could use:

  beta ~ normal(0, 100) T[0, ];

but that's going to compute the normalizing constant, which isn't needed.

Daniel

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[Ru Wang]

Thank u so much, Daniel, I really appreciate your help. 

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