Summarise data by grouping variables and count occurrences

Summarise data by grouping variables and count occurrences

Usage

.summarise_n_by_formula(data, by = character(), formula = NULL)

Arguments

data

A data.frame to summarise which must contain a n column which is a count of occurrences.

by

Character vector of column names to group by.

formula

Optional brms formula object to extract additional grouping terms from.

Value

A data.frame summarised by the grouping variables with counts.