I’ve noticed a few issues with using tuple types in cmdstanr; specifically, there are parts of cmdstanr that don’t seem to understand tuples and can trigger cryptic errors. Passing tuple data to cmdstan The cmdstanr:::process_data() function (which takes a named list of data, does some pre-proces…

Pinging @stevebronder who has also been looking at this recently, as well as the usual suspects @jonah @rok_cesnovar @andrjohns

This may be a good thread to bring up that I’m also having trouble using tuples in partial sum functions. Specifically, if I declare an argument of the partial sum function like tuple(matrix, matrix) var, I get some errors when calling the function with reduce_sum().

[image] mhollanders: I get some errors when calling the function with reduce_sum(). Could you share some more code or the errors you’re receiving?

Sure. This one works, where lambda_mu and lambda_hp are two vectors used in the function: real partial_sum_lpmf( data array[] int seq_region, data int start, data int end, data int n_date_max, data int n_call_max, data array[] int n_site, data array[,] int n_date, data array[,,] int n_call…

Thanks, I’ve opened reduce_sum fails if tuples are passed · Issue #3041 · stan-dev/math · GitHub . If you have more examples or anything they can be posted there. It seems like we’re just missing a specific overload of one of the functions we use internally for reduce_sum

This is just me reporting that I’ve run into this issue (edit: the reduce_sum issue), in case it helps to bump its priority up :)

Just chiming in here on this old thread to say that, it took a while, but much better tuple support is finally coming to cmdstanr in v1.0: Better support for tuple and complex variables in fits, data and inits by jgabry · Pull Request #1287 · stan-dev/cmdstanr · GitHub .

Issues with tuples in cmdstanr

Interfaces

mhollanders March 28, 2024, 9:55pm 7

There was also this issue, but I wasn’t able to generate a reproducible example.

Topic		Replies	Views
Tuple in cmdstanpy Developers	5	442	December 7, 2023
Expose_stan_functions not working with tuple RStan rstan	3	169	September 15, 2024
CmdStan & Stan 2.33 release candidate General	27	2841	September 2, 2023
Proof of concept: Binary output format for cmdstan Developers	74	2092	April 8, 2026
Stuck at Warmup iteration with no error : CmdStanR CmdStan techniques , fitting-issues	48	4076	April 21, 2020

Issues with tuples in cmdstanr

Related topics