bad error msg for logit

[Andrew Gelman]

Hi, I was doing logit and got this message:

TRANSLATING MODEL 'logit' FROM Stan CODE TO C++ CODE NOW.
Show Traceback

Rerun with Debug
Error in stanc(file = file, model_code = model_code, model_name = model_name, :
failed to parse Stan model 'logit' with error message:
SYNTAX ERROR, MESSAGE(S) FROM PARSER:
no matches for function name="bernoulli_logit_log"
arg 0 type=vector
arg 1 type=vector
available function signatures for bernoulli_logit_log:
0. bernoulli_logit_log(int, real) : real
1. bernoulli_logit_log(int, real[1]) : real
2. bernoulli_logit_log(int, vector) : real
3. bernoulli_logit_log(int, row vector) : real
4. bernoulli_logit_log(int[1], real) : real
5. bernoulli_logit_log(int[1], real[1]) : real
6. bernoulli_logit_log(int[1], vector) : real
7. bernoulli_logit_log(int[1], row vector) : real
unknown distribution=bernoulli_logit

ERROR at line 11
9: }
10: model {
11: y ~ bernoulli_logit(b[1] + b[2]*x);
^
12: }


WTF?

OK, I figured it out, I’d mistakenly declared y as a vector, thus “real,” not integer. But the err message says “unknown distribution=bernoulli_logit”. That’s confusing.

See you
A

[Bob Carpenter]

I agree that we should fix this. It's better now,
but still has three issues I list here:

https://github.com/stan-dev/stan/issues/1425

Please comment if you don't like my proposed changes.

- Bob

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