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plot_model_diag_stan: Global priors are not plotted #623

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plot_model_diag_stan: Global priors are not plotted #623

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b8309eb
fixed plotting of global priors
mutlusun Apr 8, 2020
3f7ee58
Merge remote-tracking branch 'upstream/master'
mutlusun Jul 22, 2020
516d5ce
Merge branch 'master' into pr/623
strengejacke Jan 9, 2022
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23 changes: 8 additions & 15 deletions R/plot_diag_stan.R
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Expand Up @@ -9,31 +9,16 @@ plot_diag_stan <- function(model, geom.colors, axis.lim, facets, axis.labels, ..
alpha <- .3
scale <- .9


if (inherits(model, "brmsfit")) {

# check if brms can be loaded

if (!requireNamespace("brms", quietly = TRUE))
stop("Package `brms` needs to be loaded first!", call. = F)

# check if prior sample are available

d2 <- brms::prior_samples(model)

if (is.null(d2))
stop("No prior-samples found. Please use option `sample_prior = TRUE` when fitting the model.", call. = FALSE)


# get samples from posterior and prior

d2 <- dplyr::select(
d2,
string_starts_with("b_", colnames(d2)),
-string_starts_with("b_Intercept", colnames(d2))
)


d1 <- brms::posterior_samples(model)

d1 <- dplyr::select(
Expand All @@ -42,6 +27,14 @@ plot_diag_stan <- function(model, geom.colors, axis.lim, facets, axis.labels, ..
-string_starts_with("b_Intercept", colnames(d1))
)


# check if prior sample are available

d2 <- brms::prior_samples(model, pars=colnames(d1))

if (is.null(d2))
stop("No prior-samples found. Please use option `sample_prior = TRUE` when fitting the model.", call. = FALSE)

} else if (inherits(model, c("stanreg", "stanfit"))) {

# check if rstanarm can be loaded
Expand Down