plot_trace: Plot traces of posterior draws of a parameter
In jrfaulkner/spmrf: Shrinkage-Prior Markov Random Field Smoothing

Plots the posterior draws of a specified parameter by MCMC iteration with options for visual differentiation of separate chains.

1 2	plot_trace(postob, vname, pscale = "original", stack = FALSE, colset = "color")

`postob`	An array containing posterior draws from a `spmrf` model fit or `stan` model fit. Model fit objects of type `stanfit` can be coerced into arrays using either the `extract` or `as.array.stanfit` functions from the rstan package.
`vname`	Name of variable to plot. Name must correspond to a dimname in the array.
`pscale`	Plotting scale. Options are 'original', 'log', or 'inv' (inverse).
`stack`	Indicator to plot chains separately and stack the plots.
`colset`	Color scheme for plotting traces by chain. Schemes 'color' and 'gray' will produce separate colors or gray shades for each chain, and scheme 'black' will make all chain traces black.