cts: Continuous Time Autoregressive Models

Provides tools for fitting continuous-time autoregressive (CAR) and complex CAR (CZAR) models for irregularly sampled time series using an exact Gaussian state-space formulation and Kalman filtering/smoothing. Implements maximum-likelihood estimation with stable parameterizations of characteristic roots, model selection via AIC, residual and spectral diagnostics, forecasting and simulation, and extraction of fitted state estimates. Methods are described in Wang (2013) <doi:10.18637/jss.v053.i05>.

Version: 1.0-26
Published: 2026-05-17
DOI: 10.32614/CRAN.package.cts
Author: Granville Tunnicliffe-Wilson [aut], Zhu Wang [aut, cre], Cleve Moler [ctb, cph], Jack Dongarra [ctb, cph], Jim Bunch [ctb, cph], G. W. Stewart [ctb, cph], John Nash [ctb]
Maintainer: Zhu Wang <zwang145 at uthsc.edu>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
Copyright: see file COPYRIGHTS
NeedsCompilation: yes
Citation: cts citation info
Materials: README, NEWS
In views: TimeSeries
CRAN checks: cts results

Documentation:

Reference manual: cts.html , cts.pdf

Downloads:

Package source: cts_1.0-26.tar.gz
Windows binaries: r-devel: cts_1.0-25.zip, r-release: cts_1.0-25.zip, r-oldrel: cts_1.0-25.zip
macOS binaries: r-release (arm64): cts_1.0-26.tgz, r-oldrel (arm64): cts_1.0-26.tgz, r-release (x86_64): cts_1.0-26.tgz, r-oldrel (x86_64): cts_1.0-26.tgz
Old sources: cts archive

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