Re: [stan-users] creating a row vector in parameter block in STAN

[Michael Betancourt]

No, you can’t.  The max condition introduces a discontinuity

that will compromise the efficacy of the sampling algorithms.

Remember that the scope of the Stan modeling language is

nominally models with continuous probability densities.

On Dec 12, 2016, at 8:06 AM, Tas <t.ta...@gmail.com> wrote:

Hi everyone,

The parameter block of my STAN code looks like:

    real<lower=0> mu;

    real<lower=0,upper=1> k;

    real<lower=1> p;

    real<lower=0> c;

    real<lower=0> alpha;

    real<lower= max(0.00,-alpha/ (k-1)) > beta;

But this shows me the error as:

SYNTAX ERROR, MESSAGE(S) FROM PARSER:

No matches for: 

  max(real, real)

Available argument signatures for max:

  max(int[])

  max(real[])

  max(vector)

  max(row vector)

  max(matrix)

  max(int, int)

  

ERROR at line 54

 52:    real<lower=0> c;

 53:    real<lower=0> alpha;

 54:    real<lower=max(0.00,alpha/(1-k))> beta;

                                        ^

 55:    }

Now I want to create a 2 element row vector whose first element will be "0.00" and second one will be "alpha/(1-k)". Then I will take the maximum of these two elements as the lower bound for "beta". How can I do this?

Tas

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[Tas]

Oh!! Thanks.