Add the observed-data layer to an er_vpc VPC

Bins the observed data by plot_by (see er_vpc()) and computes its response summary (rate/mean + confidence interval, plus empirical percentiles for a continuous/count response), for later comparison against a simulated layer added via er_vpc_add_simulated().

Usage

er_vpc_add_observed(object, style = er_style_vpc_observed_mean_errorbar, ...)

Arguments

object

Partially constructed VPC (has S3 class er_vpc).

style

A function determining how the observed layer is drawn; see er_style_vpc_observed().

...

Additional named arguments forwarded to style.

Value

object, with object$layer$observed populated.

Details

plot_by/n_bins/conf_level/probs are set once on er_vpc() itself (rather than here) so the observed and simulated layers can't disagree about how the comparison is binned or summarized.

See also

er_vpc(), er_vpc_add_simulated(), er_style_vpc_observed()