.. _method-bayes_calibration-queso-chain_samples: """"""""""""" chain_samples """"""""""""" Number of Markov Chain Monte Carlo posterior samples .. toctree:: :hidden: :maxdepth: 1 **Specification** - *Alias:* samples - *Arguments:* INTEGER - *Default:* method-dependent **Description** The ``chain_samples`` keyword indicates the number of draws from the posterior distribution to perform. When an emulator is active, this will be the number of samples on the constructed surrogate model. *Default Behavior* The default number of chain samples is method-dependent. QUESO and MUQ methods use 1000. DREAM uses (number of generations) x (number of chains), resulting in chain_samples close to that specified. *Usage Tips* MCMC methods typically require a large number of chain samples to converge, often thousands to millions. **Examples** .. code-block:: method bayes_calibration queso chain_samples = 20000