cdm_nycflights13: Creates a dm object for the nycflights13 data
Description
Creates an exemplary 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 and planes tables is "weak", it does not satisfy
data integrity constraints.
Usage
cdm_nycflights13(cycle = FALSE, color = TRUE)
Arguments
cycle
Boolean. If FALSE (default), only one foreign key relation
(from flights$origin to airports$faa) between flights and airports 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 cdm_draw()