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ptw  

Parametric Time Warping
View on CRAN: Click here


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

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

Install by package version:
library("remotes")
install_version("ptw", "1.9-17")



Attach the package and use:
library("ptw")
Maintained by
Ron Wehrens
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2009-10-27
Latest Update: 2022-01-19
Description:
Parametric Time Warping aligns patterns, i.e. it aims to put corresponding features at the same locations. The algorithm searches for an optimal polynomial describing the warping. It is possible to align one sample to a reference, several samples to the same reference, or several samples to several references. One can choose between calculating individual warpings, or one global warping for a set of samples and one reference. Two optimization criteria are implemented: RMS (Root Mean Square error) and WCC (Weighted Cross Correlation). Both warping of peak profiles and of peak lists are supported. A vignette for the latter is contained in the inst/doc directory of the source package - the vignette source can be found on the package github site.
How to cite:
Ron Wehrens (2009). ptw: Parametric Time Warping. R package version 1.9-17, https://cran.r-project.org/web/packages/ptw. Accessed 28 Oct. 2026.
Previous versions and publish date:
(2026-07-09 06:44), 1.0-0 (2009-10-27 20:17), 1.0-1 (2010-11-17 17:04), 1.0-2 (2012-06-19 13:42), 1.0-3 (2012-07-26 16:06), 1.0-4 (2012-08-08 10:35), 1.0-5 (2013-01-09 22:55), 1.0-6 (2013-11-19 11:22), 1.0-7 (2014-03-30 00:17), 1.9-10 (2015-07-01 06:11), 1.9-11 (2015-08-21 11:48), 1.9-12 (2017-03-06 11:28), 1.9-13 (2018-05-26 00:17), 1.9-15 (2019-11-26 15:20), 1.9-16 (2022-01-19 14:42)
Other packages that cited ptw R package
View ptw citation profile
Other R packages that ptw depends, imports, suggests or enhances
Complete documentation for ptw
Functions, R codes and Examples using the ptw R package
Some associated functions: RMS . asysm . baseline.corr . bestref . calc.multicoef . calc.zerocoef . coda . difsm . gaschrom . lcms . mzchannel2pktab . padzeros . plot.ptw . predict.ptw . ptw-package . ptw . ptwgrid . select.traces . warp.time . wcc . whit1 . whit2 . 
Some associated R codes: RMS.R . WCC.R . asysm.R . baseline.corr.R . bestref.R . calc.multicoef.R . calc.zerocoef.R . coda.R . difsm.R . padzeros.R . plot.ptw.R . pmwarp.R . predict.ptw.R . ptw.R . ptwgrid.R . select.traces.R . summary.ptw.R . warp.sample.R . wccStick.R . whit1.R . whit2.R .  Full ptw package functions and examples
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