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When running Stan programs with low sample sizes (under 300 samples,) Stan returns a (confusing/spurious?) warning regarding the warmup.
Description:
When running an analysis with a sample size under 300, the following warning is generated;
WARNING: The initial buffer, adaptation window, and terminal buffer overflow the total number of warmup iterations.
Defaulting to a 15%/75%/10% partition, {List of used valuesfor each}
SAMPLING FOR MODEL 'example' NOW (CHAIN 1).
WARNING: The initial buffer, adaptation window, and terminal buffer
overflow the total number of warmup iterations.
Defaulting to a 15%/75%/10% partition,
init_buffer = 21
adapt_window = 110
term_buffer = 14
Chain 1, Iteration: 1 / 290 [ 0%] (Warmup)
{etc. - Runs fine}
Expected Output:
No warning, or perhaps;
WARNING: The number of warmup iterations is below the recommended amount.
Additional Information
This error message occurs even when you specify the number of the buffers and window to rstan;
fit <- stan(model_code = stanmodelcode, model_name = "example",
data = dat, iter = 200, chains = 1,
control=list(c(adapt_init_buffer=10, adapt_term_buffer=10, adapt_window=10)),verbose =TRUE)
Current Version:
v2.12.0
The text was updated successfully, but these errors were encountered:
Comment by bob-carpenter Thursday Mar 30, 2017 at 20:32 GMT
Add another message that "warmup is less than the recommended minimum 150 iterations" and then continue to dump a more detailed message that indicates it's just detail.
Issue by davidmanheim
Friday Sep 09, 2016 at 15:34 GMT
Originally opened as stan-dev/stan#2064
Summary:
When running Stan programs with low sample sizes (under 300 samples,) Stan returns a (confusing/spurious?) warning regarding the warmup.
Description:
When running an analysis with a sample size under 300, the following warning is generated;
WARNING: The initial buffer, adaptation window, and terminal buffer overflow the total number of warmup iterations.
Defaulting to a 15%/75%/10% partition, {List of used valuesfor each}
Reproducible Steps:
In R, run;
Current Output:
Expected Output:
No warning, or perhaps;
Additional Information
This error message occurs even when you specify the number of the buffers and window to rstan;
Current Version:
v2.12.0
The text was updated successfully, but these errors were encountered: