Changes in Qtools

=============================================

Version 1.0 (February 2, 2016)

- package Qtools on CRAN

=============================================

Version 1.1 (May 26, 2016)

- bugs fixed in mice.impute.rq and mice.impute.rrq
- other bugs fixed
- revised all documentation
- revised qlss, tsrq functions
- revised functions for marginal effects
- new: predict.qlss, plot.qlss, print.qlss, plot.midecdf, plot.midquantile, print.midecdf, print.midquantile
- changed midquantile.ci to confint.midquantile (S3 method)

=============================================

Version 1.2 (December 28, 2016)

- new function nlrq1 for optimization of one-parameter transformations
- argument 'conditional' added to impute.mice.rq
- bug fixed in rcTest when testing multiple quantiles
- seed in rcTest is no longer randomly generated if seed = NULL
- argument 'which' in plot.qlss changed to 'whichp'
- bug fixed in KhmaladzeFormat (significance of tests for individual slopes)

=============================================

Version 1.3 (April 20, 2018)

- added bootstrap sampling in mice.impute.rq
- more robust checks in nlrq1 and nlLoss

=============================================

Version 1.4.1 (July 13, 2019)

- new function midrq to fit mid-quantile regression with discrete responses
- new function midecdf to fit conditional mid-distribution functions
- faster implementation of GOFTest (rcTest) in C++
- rq.counts no longer supports tranformations other than logarithmic
- removed functions for quantile regression with binary responses

=============================================

Version 1.5.1 (December 13, 2019)

- fixed CRAN error related to _R_CLASS_MATRIX_ARRAY_ starting from R 4.0.0
- added robust option for vcov.midrq
- fixed bad coding in vcov.midrq that would lead to memory overload 

=============================================

Version 1.5.2 (July 8, 2020)

- new function midq2q for recovering classical quantiles from midquantiles
- fixed minor bug in vcov.midrq
- fixed bug in rq.counts
- revised plot.qlss and documentation file to avoid error on Mac

=============================================

Version 1.5.3 (November 26, 2020)

- new functions for directional quantile classification (dqc)

- fixed CRAN checks warning on stats::filter vs mice::filter

=============================================

Version 1.5.4 (February 7, 2021)

- Removed dependency on Gmisc after CRAN notified unsolved check problems with Gmisc

=============================================

Version 1.5.5 (July 28, 2021)

- Fixed bug in dqc
- Fixed bug in midq2q
- Fixed bug in predict.midrq

=============================================
