collatz

Functions Related to the Collatz/Syracuse/3n+1 Problem

v1.0.0 · Sep 5, 2022 · Apache License (== 2.0)

Description

Provides the basic functionality to interact with the Collatz conjecture. The parameterisation uses the same (P,a,b) notation as Conway's generalisations. Besides the function and reverse function, there is also functionality to retrieve the hailstone sequence, the "stopping time"/"total stopping time", or tree-graph. The only restriction placed on parameters is that both P and a can't be 0. For further reading, see <https://en.wikipedia.org/wiki/Collatz_conjecture>.

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CRAN Check Status

2 NOTE

12 OK

Show all 14 flavors

Flavor	Status	Time
r-devel-linux-x86_64-debian-clang	NOTE	45.1s
r-devel-linux-x86_64-debian-gcc	NOTE	35.5s
r-devel-linux-x86_64-fedora-clang	OK	67.7s
r-devel-linux-x86_64-fedora-gcc	OK	86.9s
r-devel-macos-arm64	OK	18s
r-devel-windows-x86_64	OK	66s
r-oldrel-macos-arm64	OK
r-oldrel-macos-x86_64	OK	49s
r-oldrel-windows-x86_64	OK	77s
r-patched-linux-x86_64	OK	41s
r-release-linux-x86_64	OK	39.7s
r-release-macos-arm64	OK
r-release-macos-x86_64	OK	58s
r-release-windows-x86_64	OK	66s

Check details (2 non-OK)

NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

Check History

NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

Dependency Network

Version History

new 1.0.0 Mar 10, 2026