mcmcdb_samples_long-methods: Extract MCMC Samples (Long form)

In jrnold/mcmcdb: MCMC sample database classes

Description

Extract MCMC samples from an object as a data frame, with columns for the flat parameter, chain, iteration, and value.

Arguments

object	An object containing the MCMC samples.
flatpars	character. Flat parameters to include. If NULL, all flat parameters.
parameters	character. Parameter arrays to include. If NULL, all parameter arrays. The union of flat parameters in parameters and flatpars is included.
chain_id	integer. Chains to include. If NULL, all chains.
iter	integer. Iterations to include. If NULL, all iterations.
...	Options passed to internal functions.

Value

A data.frame with columns

chain_id

integer. Chain id

iter

integer. Iteration number

flatpar

factor. Flat parameter name

val

numeric. Parameter values

See Also

Other McmcdbWide methods: $, $-methods, McmcdbWide-class, [, [-methods, [[, [[-methods, mcmcdb_chains, mcmcdb_drop_chain, mcmcdb_drop_chain, mcmcdb_drop_chain, mcmcdb_drop_iters, mcmcdb_drop_iters, mcmcdb_drop_iters, mcmcdb_drop_parameter, mcmcdb_drop_parameter, mcmcdb_samples_flatpars, mcmcdb_samples_flatpars, mcmcdb_samples_iter, mcmcdb_samples_iter, mcmcdb_samples_parameters, mcmcdb_samples_parameters, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten, mcmcdb_unflatten-method

Examples

library(plyr)
data(line_samples)
line_long <- mcmcdb_samples_long(line_samples)
head(line_long)
summary(line_long)
ddply(line_long, "flatpar",
      summarise, mean = mean(val), median = median(val))

jrnold/mcmcdb documentation built on May 20, 2019, 1:04 a.m.