nobs.psis_loo_ss

The number of observations in a <code>psis_loo_ss</code> object.

Efficient approximate leave-one-out cross-validation (LOO)
for Bayesian models fit using Markov chain Monte Carlo, as
described in Vehtari, Gelman, and Gabry (2017)
<doi:10.1007/s11222-016-9696-4>.
The approximation uses Pareto smoothed importance sampling (PSIS),
a new procedure for regularizing importance weights.
As a byproduct of the calculations, we also obtain approximate
standard errors for estimated predictive errors and for the comparison
of predictive errors between models. The package also provides methods
for using stacking and other model weighting techniques to average
Bayesian predictive distributions.

Jonah Gabry

Efficient Leave-One-Out Cross-Validation and WAIC for Bayesian
Models

Aki Vehtari

Mans Magnusson

Yuling Yao

Paul-Christian Bürkner

Topi Paananen

Andrew Gelman

Ben Goodrich

Juho Piironen

Bruno Nicenboim

Leevi Lindgren

nobs.psis_loo_ss function

<dl><dt>object</dt>
<dd>a <code>psis_loo_ss</code> object.</dd>
<dt>...</dt>
<dd>Currently unused.</dd></dl>

Arguments

The number of observations in a psis_loo_ss object. — nobs.psis_loo_ss

<dl>

<dt>object</dt>
<dd>a <code>psis_loo_ss</code> object.</dd>


<dt>...</dt>
<dd>Currently unused.</dd>

</dl>

The number of observations in a <code>psis_loo_ss</code> object.

nobs.psis_loo_ss: The number of observations in a `psis_loo_ss` object.

Description

Usage

Arguments