Changes in version 1.1.2 (2026-03-26)                  

    o   move 'fastmatch' from Depends to Imports in DESCRIPTION

    o   (confint.boot.pwexpm) add help document

    o   remove print.xx function in the help documents

                 Changes in version 1.1.1 (2026-03-24)                  

    o   (pew_data, pwe_data_robust_tail, ruppert_ipd) add example
	datasets

                 Changes in version 1.1.0 (2026-03-22)                  

    o   (summary.pwexpm, print.summary.pwexpm) print the actual
	optimizer used for estimation

    o   (summary.boot.pwexpm, print.summary.boot.pwexpm) print the
	actual optimizer used for estimation; print the number of
	successful iterations

    o   (summary.predict.pwexpm, print.summary.predict.pwexpm,
	summary.predict.boot.pwexpm, print.summary.predict.boot.pwexpm)
	print the number of successful simulations

    o   (coef.pwexpm) extract coefficents in 'pwexpm'

    o   (confint.boot.pwexpm) confidence intervals for model parameters

    o   (sim_followup) update the help document; add 'sim_followup'
	class

    o   (print.sim_followup) add the print function for 'sim_followup'
	class

                 Changes in version 1.0.0 (2025-04-10)                  

    o   name the package as 'PwePred'

    o   (pwexpm, boot.pwexpm, cv.pwexpm) add
	'pwexpm','boot.pwexpm','cv.pwexpm' functions that use Surv/data
	as inputs

    o   change the object name 'pwexpm.fit' to 'pwexpm', and removed
	all '.fit' part from all other objects.

    o   (dpwexpm, ppwexpm, qpwexpm, rpwexpm) change the function names
	from 'pwexp', 'ppwexp', 'qpwexp', 'rpwexp' to avoid replicate
	with the 'rpact' package

    o   (pwexpm_fit, pwexpm) return a list instead of a matrix

    o   (print.pwexpm, AIC.pwexpm, BIC.pwexpm, logLiK.pwexpm) add S3
	methods for 'pwexpm' object

    o   (plot.pwexpm) add default plot for 'pwexpm' object

    o   (plot_survival.pwexpm) return stop if no previous plot is
	called

    o   (boot.pwexpm_fit, boot.pwexpm) return a list instead of a
	matrix

    o   (print.boot.pwexpm) add S3 methods for 'boot.pwexpm' object

    o   (plot.boot.pwexpm) add default plot for 'boot.pwexpm' object

    o   (plot_survival.boot.pwexpm) return stop if no previous plot is
	called

    o   (boot.pwexpm.pwexpm, cv.pwexpm.pwexpm) update to fit the new
	'pwexpm' object

    o   (plot.cv.pwexpm) add default plot for 'cv.pwexpm' object

    o   (print.cv.pwexpm) add S3 methods for 'print.cv.pwexpm' object

    o   (predict.pwexpm, predict.boot.pwexpm) update to fit the new
	'pwexpm', 'boot.pwexpm' functions

    o   (predict.pwexpm, predict.boot.pwexpm) return a list with more
	model details

    o   (print.predict.pwexpm, print.predict.boot.pwexpm) add S3
	methods for 'predict.pwexpm', 'predict.boot.pwexpm' object

    o   (predict.boot.pwexpm) change parameter name 'censor_model_boot'
	to 'censor_model'

    o   (plot.predict.boot.pwexpm, plot.predict.pwexpm) add default
	plot

    o   (simdata) set add_column=c('followT','event') as the default
	value

    o   (pwexpm, pwexpm_fit, cv.pwexpm, cv.pwexpm_fit, boot.pwexpm,
	boot.pwexpm_fit, sim_followup, predict.pwexpm,
	predict.boot.pwexpm) allow 'seed=NULL'

                        Changes in version 0.5.0                        

    o   (predict.boot.pwexp.fit) remove 'type' parameter

    o   (plot_event.predict.boot.pwexp.fit) add 'type' parameter;
	change the dafault to 'confidence'

                        Changes in version 0.4.5                        

    o   (sim_followup) add 'follow_up_endpoint' parameter, which is
	used to define the end of follow-up

                        Changes in version 0.4.4                        

    o   (simdata) allow non-integer values in 'n_rand', 'rand_rate'

    o   (sim_followup) allow non-integer values in 'n_rand',
	'rand_rate'

                        Changes in version 0.4.3                        

    o   (simdata) change enroll behavior. For example, when
	rand_rate=20, total_sample=25, in the previous version, randT
	is between 0 to 2, but now randT is between 0 to 1.25.

                        Changes in version 0.4.2                        

    o   (pwexp.fit) add empirical number of breakpoints when
	'nbreak=NULL'

    o   (vignettes) add 'Usage of Package'

    o   (pwexp.fit, boot.pwexp.fit, cv.pwexp.fit) add 'min_pt_tail'
	parameter

    o   (sim_followup) change parameter name 'min_follow' to
	'extra_follow'

    o   (sim_followup) change parameter name 'count_in_min_follow' to
	'count_in_extra_follow'

                        Changes in version 0.4.1                        

    o   (plot_event) rewrite 'xyswitch=TRUE' to have the same result as
	'xyswitch=FALSE'

    o   add 'Depends: survival, fastmatch' to DESCRIPTION

    o   (boot.pwexp.fit, cv.pwexp.fit) correctly attach functions in
	'doSNOW', 'foreach' packages

                        Changes in version 0.4.0                        

    o   (boot.pwexp.fit) add 'parallel' option

    o   (cv.pwexp.fit) add 'parallel' option

                        Changes in version 0.3.1                        

    o   (plot_event) fix an error that 'xlab', 'ylab' do not work when
	'xyswitch=TRUE'

                        Changes in version 0.3.0                        

    o   (sim_followup) fix an error when type='sample' or 'event', but
	'at' is not an integer

                        Changes in version 0.2.0                        

    o   (pwexp.fit) fix when number of breaks is 2 more larger than
	number of event (error in combn function)

    o   (pwexp.fit) add warning 'Incorrect result returned'

    o   (pwexp.fit) fix case when no events and nbreak=0, now return
	-Inf results instead of 0

    o   (pwexp.fit) add 'tol' parameter to control the minimum gap
	between two breakpoints

    o   (predict.boot.pwexp.fit) skip unsuccessful prediction

    o   (predict.boot.pwexp.fit) add first row c(analysis_time,
	sum(para$event)) to line_data to make prediction from
	analysis_time

    o   (sim_followup) fix number of event=0 error

    o   (sim_followup) fix number of enrolled=0 error

                        Changes in version 0.1.0                        

    o   The first release.