Dear Group,

Suppose that I have a parameter theta, is it possible to use theta as a limit for another parameter, say

real theta;

real<lower=theta,> beta;

If not, is there a way to work around this?

Thanks

dong

Dear Group,

Suppose that I have a parameter theta, is it possible to use theta as a limit for another parameter, say

real theta;

real<lower=theta,> beta;

If not, is there a way to work around this?

Thanks

dong

That is possible.

Hi,

Suppose there is a parameter theta, and another parameter kappa whose range depends on a function of theta, is that still possible to implement?

Please see attached an example that does not work,

trunc.stan (216 Bytes)

trunc_test.R (132 Bytes)

is there anyway to work around this?

Thanks

dong

When the parser tells you

```
variable "L" does not exist.
error in 'model_bounds' at line 7, column 15
-------------------------------------------------
5: parameters{
6: real theta;
7: real<lower=L> kappa;
^
8: }
-------------------------------------------------
```

that is because `L`

is not defined until after the constraints on the parameters are applied. It does parse if you change the parameters block to

```
parameters{
real theta;
real<lower=-square(theta)> kappa;
}
```

although it will probably sample inefficiently.

Specifically, itâ€™s going to be inefficient if values near that lower bound are consistent with the data.