coef_posterior_density function

Plots the posterior density for FERGM model terms.

This function allows the users to examine the posterior density of FERGM model terms.

coef_posterior_density(fergm.fit = NULL, custom_var_names = NULL)

Arguments

• fergm.fit: A model object returned by the fergm function. Must be specified.
• custom_var_names: A vector of custom variable names used in presentation that match the order of the form object passed to fergm. If not provided, defaults to names inherited by fergm.fit.

Returns

This prints a list of posterior density plots produced using ggplot2.

Examples

# load example data
data("ergm.fit")
data("fergm.fit")
data("mesa")

# rstan functions
# Histogram of the posterior
rstan::stan_hist(fergm.fit$stan.fit, par = "beta")
# Density of the posteriors
rstan::stan_dens(fergm.fit$stan.fit, par = "beta")

# We have a cleaner function to look at the posterior densities
densities <- coef_posterior_density(fergm.fit = fergm.fit,
custom_var_names = c("Edges", "Sex Homophily", "Grade Homophily", "Race Homophily",
"GWESP", "Alternating K-Stars"))
densities[[1]]
densities[[2]]

References

Box-Steffensmeier, Janet M., Dino P. Christenson, and Jason W. Morgan. 2018. ``Modeling Unobserved Heterogeneity in Social Networks with the Frailty Exponential Random Graph Model." Political Analysis. (26)1:3-19.

Stan Development Team (2016). RStan: the R interface to Stan. R package version 2.14.1. http://mc-stan.org/.