2013-05-25 V_0.1-1 Youyi Fong
* create package
2013-08-14 V_0.1-2 Youyi Fong
* add set.seed(1) to chngpt.score.test so that the results are
reproducible
* rename chngpt.score.test to chngpt.test
* MASS is used for generating reference distribution samples while mvrnorm
is used in sim.sigmoid. In principle, should be able to use a single
package, but since the simulation studies for the paper has already been
run, just leave it as it is
* let search.all.thresholds be true if n < 500
2015-09-01 Youyi Fong
* when glm warns, set the log likelihood to NA
2015-09-29 Youyi Fong
* implement more vcov
* add e.effective.maxit to deal with non-convergence
2015-10-18 Youyi Fong
* when est.method==smoothapprox, effective chgnpt needs to be determined
to stop infinite loops. It used to be defined in between two observed data
values, but is not set to one observed data value
2015-11-19 Youyi Fong
* make.chngpt.var now takes b. as an argument, the results of smoothapprox
estimation will change!
2016-01-24 Youyi Fong
* add testing for linear model
2017-05-13 Youyi Fong
* modify make.chngpt.var to fit smooth transition model
* add sandwich variance estimator
* add segmented2
* change b to -b
2017-09-16 Youyi Fong
* this version contains some commented out code related to indices, which
was used to compare with R implemention
2017-10-27 Youyi Fong
* a major cleanup of sim.chngpt
* weighted estimation now works