pymc.Empirical#

class pymc.Empirical(trace=None, size=None, **kwargs)[source]#

Single Group Full Rank Approximation

Builds Approximation instance from a given trace.

It has the same interface as variational approximation.

Methods

`Empirical.__init__`([trace, size])
`Empirical.collect`(item)
`Empirical.evaluate_over_trace`(node)	Allow to statically evaluate any symbolic expression over the trace.
`Empirical.get_optimization_replacements`(s, d)	Dev - optimizations for logP.
`Empirical.make_size_and_deterministic_replacements`(s, d)	Dev - create correct replacements for initial depending on sample size and deterministic flag.
`Empirical.rslice`(name)	Dev - vectorized sampling for named random variable without call to pytensor.scan.
`Empirical.sample`([draws, random_seed, ...])	Draw samples from variational posterior.
`Empirical.sample_node`(node[, size, ...])	Sample given node or nodes over shared posterior.
`Empirical.set_size_and_deterministic`(node, s, d)	Dev - after node is sampled via `symbolic_sample_over_posterior()` or `symbolic_single_sample()` new random generator can be allocated and applied to node.
`Empirical.symbolic_sample_over_posterior`(node)	Dev - perform sampling of node applying independent samples from posterior each time.
`Empirical.symbolic_single_sample`(node[, ...])	Dev - perform sampling of node applying single sample from posterior.
`Empirical.to_flat_input`(node[, ...])	Dev - replace vars with flattened view stored in self.inputs.

Attributes

`all_histograms`
`any_histograms`
`datalogp`	Dev - computes \(E_{q}(data term)\) from model via pytensor.scan that can be optimized later.
`datalogp_norm`	Dev - normalized \(E_{q}(data term)\).
`ddim`
`has_logq`
`inputs`
`joint_histogram`
`logp`	Dev - computes \(E_{q}(logP)\) from model via pytensor.scan that can be optimized later.
`logp_norm`	Dev - normalized \(E_{q}(logP)\).
`logq`	Dev - collects logQ for all groups.
`logq_norm`	Dev - collects logQ for all groups and normalizes it.
`ndim`
`params`
`replacements`	Dev - all replacements from groups to replace PyMC random variables with approximation.
`sample_dict_fn`
`scale_cost_to_minibatch`	Dev - Property to control scaling cost to minibatch.
`single_symbolic_datalogp`	Dev - for single MC sample estimate of \(E_{q}(data term)\) pytensor.scan is not needed and code can be optimized.
`single_symbolic_logp`	Dev - for single MC sample estimate of \(E_{q}(logP)\) pytensor.scan is not needed and code can be optimized.
`single_symbolic_varlogp`	Dev - for single MC sample estimate of \(E_{q}(prior term)\) pytensor.scan is not needed and code can be optimized.
`sized_symbolic_datalogp`	Dev - computes sampled data term from model via pytensor.scan.
`sized_symbolic_logp`	Dev - computes sampled logP from model via pytensor.scan.
`sized_symbolic_varlogp`	Dev - computes sampled prior term from model via pytensor.scan.
`symbolic_logq`	Dev - collects symbolic_logq for all groups.
`symbolic_normalizing_constant`	Dev - normalizing constant for self.logq, scales it to minibatch_size instead of total_size.
`symbolic_random`
`symbolic_randoms`
`varlogp`	Dev - computes \(E_{q}(prior term)\) from model via pytensor.scan that can be optimized later.
`varlogp_norm`	Dev - normalized \(E_{q}(prior term)\).