R help - Jun 2021 - RSTAN

Dear Friends,

I have started to write some codes for RSTAN, I have a general question
regarding likelihood function.
Below you can see a simple structure of RSTAN model. For most of the codes, in
the "model" block, I saw priors (hyperpriors) and likelihood
functions.
In a few programs, I don't see a likelihood function (such as the model
shown below). Has any default function been defined in RSTAN or I am mistaking?
I would appreciate your help.

Regards,
 Peri



model.stan <- "data { int<lower=0> i;
                                 .
                                 .
                                 .

                                }

                          parameters {
                                      real Mi;
                                      real<lower=0> De;
                                      real R[i];
                                      }

                          model {
                                for(i in 1:I) {
                                              b[i] ~ normal(R[i], C[i]);
                                              R[i] ~ normal(Mi,  De);
                                              }

                                Mi ~ normal(0, 10);
                                De ~ uniform(0,sigma);
                                }"

stan(model_code = model.stan,
     data = data,
     init = rep(.),
     chains = .,
     iter =iter1,
     .
     .
     refresh = 50000
)

	[[alternative HTML version deleted]]

Off topic. Read the Posting Guide before posting here.

You may find a more suitable forum via the Url entry in the rstan description
file [1].

[1] https://cran.r-project.org/web/packages/rstan/index.html

On June 19, 2021 6:15:04 PM PDT, peri He <statistics84 at hotmail.com>
wrote:
>Dear Friends,
>
>I have started to write some codes for RSTAN, I have a general question
>regarding likelihood function.
>Below you can see a simple structure of RSTAN model. For most of the
>codes, in the "model" block, I saw priors (hyperpriors) and
likelihood
>functions.
>In a few programs, I don't see a likelihood function (such as the model
>shown below). Has any default function been defined in RSTAN or I am
>mistaking?
>I would appreciate your help.
>
>Regards,
> Peri
>
>
>
>model.stan <- "data { int<lower=0> i;
>                                 .
>                                 .
>                                 .
>
>                                }
>
>                          parameters {
>                                      real Mi;
>                                      real<lower=0> De;
>                                      real R[i];
>                                      }
>
>                          model {
>                                for(i in 1:I) {
>                                             b[i] ~ normal(R[i], C[i]);
>                                              R[i] ~ normal(Mi,  De);
>                                              }
>
>                                Mi ~ normal(0, 10);
>                                De ~ uniform(0,sigma);
>                                }"
>
>stan(model_code = model.stan,
>     data = data,
>     init = rep(.),
>     chains = .,
>     iter =iter1,
>     .
>     .
>     refresh = 50000
>)
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
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>PLEASE do read the posting guide
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>and provide commented, minimal, self-contained, reproducible code.
-- 
Sent from my phone. Please excuse my brevity.