Changes in version 1.3.4-7 (2026-04-10) - Fixed segmentation fault error that occurred in the Fortran programs particle_smootherf.f and particle_smoother_nonlinearf.f. Changes in version 1.3.4-6 - Changed package maintainer. Changes in version 1.3.4-5 (2023-09-29) - Fixed usage of KIND in Fortran file for warning reported in CRAN package check results. - Specified all variable types explicitly instead of using implicit variable types. Changes in version 1.3.4-4 (2023-07-05) - Collected legacy Fortran code (DCMPLX, DREAL, DIMAG, DCABS, DCONJG). Changes in version 1.3.4-3 - Added error handling when lag is too large compared to as.integer(period/2) to lsqr(). Changes in version 1.3.4-2 (2023-04-16) - Fixed the LTO (Link-Time Optimization) problems with Fortran source code reported in CRAN package check results. - Fixed an issue with the S3 method that was reported as NOTE in the pre-test. Changes in version 1.3.4 (2023-03-24) - Removed C wrapper functions and registered entry points for the routines accessed by the .Fortran interface to call Fortran subroutines. - URL: http://www.data.jma.go.jp/obd/stats/etrn/ moved to https://www.data.jma.go.jp/obd/stats/etrn/ in Rainfall.Rd and Temperature.Rd. - Added a new argument log.base = c("e" (default), "10") to season(). - Added error handling when local span is too small compared to max.arorder to lsar(). - Added a ‘NEWS.md’ file. Changes in version 1.3.3 - Added a new argument period (period of one cycle) to lsqr(). - Added a new argument cov (covariance matrix of the smoother) to trend(). - Added a new argument llkhood (log-likelihood) to ngsmth(). - Fixed the number of frequencies for spectrum plots in lsar(). - Fixed a bug in tsmooth() where the value of esterr was not included in the return value. - Changed grayscale gradient in pfilter() and pfilterNL() plots. Changes in version 1.3.2 - Added examples of pairs plots to the help pages for HAKUSAN and Haibara datasets. - Fixed a bug in season() and changed the interpretation of argument period. In the case of period = 7, the data is daily (7 days a week) and not weekly. - Corrected the source code of the Fortran subroutines FFARMA (armaftf.f) and FFSEAS (seasonf.f) to avoid runtime errors. - Added error handling for missing data values to arfit(), armafit() and armafit2(). Changes in version 1.3.1 (2021-01-07) - Exported functions (i.e., print.tvvar(), plot.tvvar() and plot.pfilter()) for an extension package TSSSomp using OpenMP. - Removed the perspective plot from the output of ngsmth(). - Added the following references: - Kitagawa, G. (2020) Introduction to Time Series Modeling with Applications in R. Chapman & Hall/CRC. - Kitagawa, G. (2020) Introduction to Time Series Modeling with R (in Japanese). Iwanami Publishing Company. Changes in version 1.3.0 - Added a new argument lag to period(). - Added pfilter() (Particle filtering and smoothing) and pfilterNL() (Particle filtering and nonlinear smoothing) functions. - Added armafit2() function (Scalar ARMA model fitting: Estimate all ARMA models within the user-specified maximum order using maximum likelihood method). - Added tsp attribute to all datasets. - Added Haibara, Nikkei225 and Rainfall datasets. - Added an example using Haibara dataset in crscor(). - Output the value of arcoef for each order of the AR model in arfit(). - Changed value of noisew of examples in ngsmth(). - Specified the allowed values for trend.order, seasonal.order, ar.order and period arguments in season(). - Added Note about frequency setting, i.e., for data with the tsp attribute, the frequency attribute has priority over the period argument in season(). - Changed the default value for lag from 10 to sqrt(n), where n is the length of the input time series. - Changed the plot style of evolutionary power spectra in plot.tvspc(). - Changed the function name from armaimp() to armachar(). - Fixed a bug in subroutine istat3 (armafitf.f). - Changed default values for wminmax in case of noisew = 2 (Pearson) and vminmax in case of noisev = 2 (Pearson) in ngsim(). Changes in version 1.2.4 (2019-04-22) - Used the gammafn function provided by R instead of the DGAMMA function in the original Fortran source, because an error was found in TSSS-00install.out on r-patched-solaris-x86. Changes in version 1.2.3 (2019-04-15) - Changed to use the warning() function instead of the cat() function to print warning messages. Changes in version 1.2.2 - Fixed Fortran code for subroutine ARYULE (comsub.f) according to the warning message when using gfortran with -fpic -g -O2 -Wall -mtune=native. Changes in version 1.2.1 - Changed the implementation of the random number generator to Mersenne-Twister. Changes in version 1.2.0 - Fixed bugs in arfit(), ngsmth() and trend(). - Fixed Fortran code according to the warning message when using gfortran with -Wall -pedantic. - Merged gdensty(), cdensty(), pdensty(), exdensty(), chi2densty(), dexdensty() and udensty() into pdfunc(). - Renamed lsar1() and lsar2() functions to lsar() and lsar.chgpt() respectively. - Added S3 methods for class objects returned by functions. - Added ‘src/init.c’. Changes in version 1.1.0 - Changed Sunspot dataset into a part of sunspot.year in R`s core datasets package. - Corrected the tile of the HAKUSAN dataset. Changes in version 1.0.1 - Corrected ‘inst/doc/index.html’ according to the error message from the W3C Markup Validator Service.