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topdowntimeratio  

Top-Down Time Ratio Segmentation for Coordinate Trajectories
View on CRAN: Click here


Download and install topdowntimeratio package within the R console
Install from CRAN:
install.packages("topdowntimeratio")

Install from Github:
library("remotes")
install_github("cran/topdowntimeratio")

Install by package version:
library("remotes")
install_version("topdowntimeratio", "0.1.0")



Attach the package and use:
library("topdowntimeratio")
Maintained by
Danielle McCool
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2022-09-22
Latest Update: 2022-09-22
Description:
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.
How to cite:
Danielle McCool (2022). topdowntimeratio: Top-Down Time Ratio Segmentation for Coordinate Trajectories. R package version 0.1.0, https://cran.r-project.org/web/packages/topdowntimeratio. Accessed 15 Jul. 2026.
Previous versions and publish date:
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Complete documentation for topdowntimeratio
Functions, R codes and Examples using the topdowntimeratio R package
Some associated functions: getSegments . getSegsExtra . iterate . meanFilter . medianFilter . pipe . radiusOfGyrationDT . setup . splitDiffTime . tdtr . topdowntimeratio-package . 
Some associated R codes: error-calc.R . filters.R . segments.R . topdowntimeratio-package.R . tsiter.R . utilities.R . utils-pipe.R .  Full topdowntimeratio package functions and examples
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