Changes in Qtools

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Version 1.0 (February 2, 2016)

- Package Qtools on CRAN

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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)

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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)

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Version 1.3 (April 20, 2018)

- Added bootstrap sampling in mice.impute.rq
- More robust checks in nlrq1 and nlLoss

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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

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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 

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