I am not sure the following two is possible or not.

- I want to plot data synthesized in a transformed data block,
- I also want to define character valued function in Stan file, as following manner.

My desired code

```
stanmodelcode <- "
functions {
char foo(int x ) {
if(x) y = "TRUE";
if(!x) y = "FALSE";
return y;
}
}
data {
int<lower=0> N;
real z[N];
}
transformed data {
real x[3];
real y[3];
x[1] = normal_rng (0,1);
x[2] = normal_rng (0,1); should change seed?...how??
x[3] = normal_rng (0,1);
y[1] = normal_rng (0,1);
y[2] = normal_rng (0,1);
y[3] = normal_rng (0,1);
plot(x,y); // I want to plot the data from stan file, is it possible?
print(foo(0),foo(1)); // I also want to define char-valued function in Stan file, possible?
}
parameters {
real mu;
}
model {
target += normal_lpdf(mu | 0, 10);
target += normal_lpdf(z | mu, 1);
}
"
z <- rnorm(20)
dat <- list(N = 20, z = z);
fit <- stan(model_code = stanmodelcode, model_name = "example",
data = dat, iter = 2012, chains = 3, verbose = TRUE,
sample_file = file.path(tempdir(), 'norm.csv'))
```