R Observatory: Metrics for topdowntimeratio version 0.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

topdowntimeratio

0.1.0Package record

Top-Down Time Ratio Segmentation for Coordinate Trajectories

0packages depend

2.6Kdownloads / year

65.2%test coverage

0/13flavors OK

Overview

About

Maintained by Danielle McCoolCRAN page ↗

Data collected on movement behavior is often in the form of time- stamped latitude/longitude coordinates sampled from the underlying movement behavior. These data can be compressed into a set of segments via the Top- Down Time Ratio Segmentation method described in Meratnia and de By (2004) doi:10.1007/978-3-540-24741-8_44 which, with some loss of information, can both reduce the size of the data as well as provide corrective smoothing mechanisms to help reduce the impact of measurement error. This is an improvement on the well-known Douglas-Peucker algorithm for segmentation that operates not on the basis of perpendicular distances. Top-Down Time Ratio segmentation allows for disparate sampling time intervals by calculating the distance between locations and segments with respect to time. Provided a trajectory with timestamps, tdtr() returns a set of straight- line segments that can represent the full trajectory. McCool, Lugtig, and Schouten (2022) doi:10.1007/s11116-022-10328-2 describe this method as implemented here in more detail.

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("topdowntimeratio", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-topdowntimeratio

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-topdowntimeratio

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-topdowntimeratio

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13NOTE

Check messages

NOTERd filesr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64, r-oldrel-macos-arm64, r-oldrel-macos-x86_64, r-oldrel-windows-x86_64, r-patched-linux-x86_64, r-release-linux-x86_64, r-release-macos-arm64, r-release-macos-x86_64, r-release-windows-x86_64

checkRd: (-1) getSegsExtra.Rd:14: Lost braces
    14 | \item{data}{data.table returned from function /code{tdtr}}
       |                                                    ^

CRAN check page ↗

Slowest check: 1.1 min · r-oldrel-windows-x86_64

Status changes

NOTE13 NOTE2026-06-08
ERROR12 NOTE, 1 ERROR2026-06-07
NOTE14 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.0

READMEYes · 205 wordsVignettesNoNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 11 (2 internal)includes a package overview page
Examples that run: 100%4 run in a plain check
Exported functions with examples: 50%
Documented parameters: 94%
Return-value docs: 100%
Help pages citing references: 0%

How these are measured

Downloads

2.6K

CRAN downloads in the past year

Rank #22,014 · ~7/day · ~213/mo

Releases R versions

Daily download trend is not available in this view yet.

21830 days

60290 days

2.6K1 year

Compare downloads with other packages →

Also on69 r2u3 autocran

How downloads are counted

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Installing topdowntimeratio adds 7 packages (5 with compiled code, 7.6 MB of source tarballs). Heaviest: data.table 5.7 MB, geodist 790 KB, lubridate 420 KB.

Depends (1)

R >= 4.1

Imports (5)

data.table geodist lubridate magrittrstats

LinkingTo (0)

none

Suggests (2)

spelling testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Danielle McCool

Author, Maintainer since 0.1.0 (2022)

Releases (1)

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.1.0Latest
record
2022-09-22 · current release
R
R 4.2.0 released · 2022-04-22

Package metadata

First published: 2022-09-22
Total releases: 1 / 4 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 4.1
Download size: 29 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("topdowntimeratio")

Format

McCool, D. (2022). topdowntimeratio: Top-Down Time Ratio Segmentation for Coordinate Trajectories (Version 0.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.topdowntimeratio

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for topdowntimeratio version 0.1.0 [Data set]. HJJB, LLC. Data release v2026-10-23. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-23, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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