A general question about variable declarations in model block

General
1

I’m still feeling uncomfortable about which block variable declarations should be put. For example, I want to create a vector to do element-wise operation in a later loop:

vector[N] Z = A*B

where A is a matrix containing data and parameter and B is a vector containing data. Then I use Z to do element-wise operations in a loop, e.g.

for (i in 1:N){
    D[i] = (Y[i] <= Z[i] ?  1:0);
}

Then I received a message that “Variable “vector” does not exist”.
So I wonder where should I put the declaration?

2

Can you paste your model? Nothing is wrong with how you did it here, so something must be wrong elsewhere.

3

what interface are you using and what version?

I don’t know what version of RStan started using the new compiler - the old compiler required all variable declarations to come at the beginning of a block - this rather looks like the error message that would have been generated if that were the case.

also note: the variables in the model block are local variables and are not written as part of the output.

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4

Thanks for pointing it out! After moving those declarations on the top of model block, the issue resolved.

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