Hi Everyone,

Longtime lurker here. Maybe you can help me with a problem. I’ve been trying to figure out how to use the Rmarkdown Stan chunks in Rstudio.

I know the recently added support for Stan chunks but I cannot seem to get them to work correctly.

If I make a chunk with a model like so:

```
data {
int K;
int N;
int D;
int y[N];
vector[D] x[N];
}
parameters {
matrix[K,D] beta;
}
model {
for (k in 1:K)
beta[k] ~ normal(0, 5);
for (n in 1:N)
y[n] ~ categorical_logit(beta * x[n]);
```

I am returned the following error:

```
PROGRAM ERROR, MESSAGE(S) FROM PARSER:
Error in stanc(file = file, model_code = model_code, model_name = model_name, :
failed to parse Stan model 'stan-1b544013772e' due to the above error.
```

Has anyone got any experience using Stan chunks and could help me out?

All input is appreciated.