kapelner
commented
11 months ago Can you provide a working example with the data?
On Sun, Oct 15, 2023, 22:14 schwa021 @.***> wrote:
I am running a dichotomous classification problem using bartMachine.
When I check the posterior (example below) using bart_machine_get_posterior I see some negative values.
[image: image] https://user-images.githubusercontent.com/25011558/275373786-eb577e28-8860-47c6-a0e4-a4ed32dd0c69.png
According to the help, the units are probabilities (e.g., not probits).
"y_hat_posterior_samples The full set of posterior samples of size num_iterations_after_burn_in for each observation. For regression, the estimates have the same units as the response. For classification, the estimates are probabilities."
Thus, negative values should be impossible. Any thoughts regarding what's happening here? It's not an isolated case.
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schwa021
I am running a dichotomous classification problem using bartMachine.
When I check the posterior (example below) using _bart_machine_getposterior I see some negative values.
According to the help, the units are probabilities (e.g., not probits).
"_y_hat_posterior_samples The full set of posterior samples of size num_iterations_after_burnin for each observation. For regression, the estimates have the same units as the response. For classification, the estimates are probabilities."
Thus, negative values should be impossible. Any thoughts regarding what's happening here? It's not an isolated case.