ffsimulator 1.1.0 2021-09-11

This release of ffsimulator adds new features and refactors a lot of the backend for improved calculation efficiency.

New features

  • ff_simulate_week() is a new function (and supporting internal function family) that simulates upcoming inseason weeks with daily-updated upcoming week ranks.
  • ff_simulate() gains an actual_schedule argument to simulate actual schedule + unplayed games.
  • ff_simulate() and ff_simulate_week() gain a verbose argument that is set ON by default and can also be turned off with options(ffsimulator.verbose = FALSE)
  • ffs_copy_template() helps build custom simulations by copying a template of starter code to a desired filepath.
  • Simulations now support kickers (you can thank SFB for that!) and gain a pos_filter argument.

Backend changes

Many backend changes - some are breaking (grimaces and points at the experimental badge).

  • Parallel options removed in favour of data.table options. BREAKING - parallel is gone.
  • Column assertions should be clearer on each error message.
  • Many functions, including ffs_optimise_lineups(), ffs_score_rosters(), and more are now written in data.table - this helps improve speed for all sizes of simulations.
  • injury_model argument is now renamed to gp_model. BREAKING - argument name changed.
  • autoplot() refactored to hide legend and axis titles via geom/scale and not via theme - this allows for much easier theming (since you can apply a whole new theme via +).
  • ffs_build_schedules() now matches syntax from ffscrapr::ff_schedule() - team is now franchise_id and opponent is now opponent_id - BREAKING - output column names changed.
  • ffs_build_schedules() is now responsible for joining franchises to the schedule, and not ffs_summarise_week(), and now takes a franchises dataframe as created by ffs_franchises() BREAKING
  • ffs_repeat_schedules() supports the actual_schedule feature by repeating it by n_seasons.
  • Print methods cleaned up.

Immensely grateful to everyone who used and shared the first release of this package - it’s been very motivating! Special thanks to @JoeSydlowski, @topfunky, @mrcaseb for their contributions and feedback.


ffsimulator 1.0.0 2021-07-20

The ffsimulator package uses bootstrap resampling to run fantasy football season simulations supported by historical rankings and nflfastR data, calculating optimal lineups, and returning aggregated results.

This initial release introduces two major functions:

and also introduces a suite of subfunctions that power the main simulation, mostly prefixed with ffs_

Finally, this first version includes two dataframes:

  • fp_rankings_history provides historical expert consensus rankings from 2012-2020
  • fp_injury_table calculates the odds of a player playing in any given game

Other features developed for initial release include:

Features postponed to subsequent versions:

  • Progress bar for verbose output
  • Investigating speedup packages for higher volumes
  • Using real ff_schedules rather than simulated schedules
  • Support for kicker scoring