thin_draws {posterior}

Thin draws objects

Description

Thin draws objects to reduce their size and autocorrelation in the chains.

Usage

thin_draws(x, thin = NULL, ...)

## S3 method for class 'draws'
thin_draws(x, thin = NULL, ...)

## S3 method for class 'rvar'
thin_draws(x, thin = NULL, ...)

Arguments

x

(draws) A draws object or another R object for which the method is defined.

thin

(positive numeric) The period for selecting draws. Must be between 1 and the number of iterations. If the value is not an integer, the draws will be selected such that the number of draws returned is equal to round(ndraws(x) / thin). Intervals between selected draws will be either ceiling(thin) or floor(thin), such that the average interval will be close to the thin value. If NULL, it will be automatically calculated based on bulk and tail effective sample size as suggested by Säilynoja et al. (2022).

...

Arguments passed to individual methods (if applicable).

Value

A draws object of the same class as x.

References

Teemu Säilynoja, Paul-Christian Bürkner, and Aki Vehtari (2022). Graphical test for discrete uniformity and its applications in goodness-of-fit evaluation and multiple sample comparison. Statistics and Computing. 32, 32. doi:10.1007/s11222-022-10090-6

Examples

x <- example_draws()
niterations(x)

x <- thin_draws(x, thin = 5)
niterations(x)