Plot a PoRT subgroup diagnostic

Draws the reported subgroups as a horizontal bar chart of exposure prevalence, with dashed reference lines at beta and 1 - beta. Bar width is proportional to subgroup size, and low-support subgroups are highlighted. A sequential result is faceted by time point, and each facet carries its own resolved thresholds. A censoring run is faceted by both time point and row type, so the exposure and censoring subgroups are separated, the censoring facets plot censoring prevalence, and each facet's reference lines are drawn from the thresholds that family was judged against.

Arguments

object

A port_result from check_port() or check_port_seq().

low_support_only

If TRUE, draw only the low-support subgroups. Defaults to FALSE, which draws every reported subgroup.

...

Not used.

Value

A ggplot2::ggplot object.

Details

A full result can report hundreds of subgroups, which crowds the y axis. Setting low_support_only = TRUE draws only the low-support subgroups and drops the fill legend, while the facets and reference lines are kept, so a facet without bars means nothing read as low support at that time point.

Examples

set.seed(1)
n <- 400
x1 <- rnorm(n)
exposure <- rbinom(n, 1, ifelse(x1 > 1, 0, 0.5))
df <- data.frame(exposure = exposure, x1 = x1)
result <- check_port(df, exposure, x1)
#> ℹ Treating `.exposure` as binary

autoplot(result)

autoplot(result, low_support_only = TRUE)