Creates a dm object for the nycflights13 data

Creates an example dm object from the tables in nycflights13, along with the references. See nycflights13::flights for a description of the data. As described in nycflights13::planes, the relationship between the flights table and the planes tables is "weak", it does not satisfy data integrity constraints.

dm_nycflights13(cycle = FALSE, color = TRUE, subset = TRUE)

Arguments

cycle	Boolean. If `FALSE` (default), only one foreign key relation (from `flights$origin` to `airports$faa`) between the `flights` table and the `airports` table is established. If `TRUE`, a `dm` object with a double reference between those tables will be produced.
color	Boolean, if `TRUE` (default), the resulting `dm` object will have colors assigned to different tables for visualization with `dm_draw()`.
subset	Boolean, if `TRUE` (default), the `flights` table is reduced to flights with column `day` equal to 10.

Value

A dm object consisting of nycflights13 tables, complete with primary and foreign keys and optionally colored.

Examples

dm_nycflights13() %>%
  dm_draw()