Zhipeng Xu <xzhipeng@umich.edu>, Chenkai Sun <sunchenk@umich.edu>, Aman Karunakaran <akarunak@umich.edu>, Quentin Stout<qstout@umich.edu>

Hansjoerg Neth [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-5427-3141>),
  Nico Gradwohl [aut] (ORCID: <https://orcid.org/0000-0002-8703-905X>)

Trevor Hastie [aut, cre],
  Rob Tibshirani [aut],
  Sourav Chatterjee [aut]

Mohamed Soudy [aut, cre],
  Ali Mostafa [aut]

Martin Penzel [ctb, cre],
  Jürgen Stumpp [aut],
  Jörg Ottenbacher [ctb],
  Stephan Grund [ctb],
  movisens GmbH [cph]

Brodie Gaslam [aut, cre],
  Michael https://github.com/MichaelChirico [ctb],
  R Core Team [cph] (Traceback function sources.)

André F. B. Menezes [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-3320-9834>),
  Josmar Mazucheli [aut] (ORCID: <https://orcid.org/0000-0001-6740-0445>)

Edzer Pebesma [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-8049-7069>),
  Thomas Mailund [aut],
  Tomasz Kalinowski [aut],
  James Hiebert [ctb],
  Iñaki Ucar [aut] (ORCID: <https://orcid.org/0000-0001-6403-5550>),
  Thomas Lin Pedersen [ctb]

Jamie Lentin [aut, cre],
  Anthony Hennessey [aut]

Pere Joan Ferrando, David Navarro-Gonzalez, Urbano Lorenzo-Seva

Jonas Moss [aut, cre] (ORCID: <https://orcid.org/0000-0002-6876-6964>),
  Thomas Nagler [ctb],
  Chitu Okoli [ctb]

Nathakhun Wiroonsri [cre, aut] (ORCID:
    <https://orcid.org/0000-0003-2167-9641>),
  Onthada Preedasawakul [aut] (ORCID:
    <https://orcid.org/0000-0002-4186-3158>)

Joe Thorley [aut, cre] (ORCID: <https://orcid.org/0000-0002-7683-4592>),
  Kirill Müller [ctb] (ORCID: <https://orcid.org/0000-0002-1416-3412>),
  Poisson Consulting [cph, fnd]

Michael D. Sumner [aut, cre],
  Simon Wotherspoon [ctb],
  Hadley Wickham [ctb] (named the concept, provided excellent guidance
    via tidyr source code)

Richard Chandler [aut],
  Ken Kellner [cre, aut],
  Ian Fiske [aut],
  David Miller [aut],
  Andy Royle [aut],
  Jeff Hostetler [aut],
  Rebecca Hutchinson [aut],
  Adam Smith [aut],
  Lea Pautrel [aut],
  Marc Kery [ctb],
  Mike Meredith [ctb],
  Auriel Fournier [ctb],
  Ariel Muldoon [ctb],
  Chris Baker [ctb]