qqtest 1.2.0

Background

Previous releases depended upon the lmRob() function from the robust package. This package became orphaned on CRAN, archived, and removed. Consequently, the dependency needed to be addressed for `qqtest.

This was not done in time for R core policy, so qqtest was removed from CRAN.

Release 1.2.0 remedies this and adds some functionality. There are now no dependencies beyond base packages grDevices, graphics, and stats.

Changes

When lineup = TRUE the value returned by qqtest() is now just a string containing an obfuscated location of the true data. It is no longer a list with a single names component trueLoc.

New functionality

qqtest 1.1.0

Released on CRAN in April 2015, removed by R core March 2020 because of dependency on robust package orphaned and archived then.

Functionality based on

Implemented matching of slope and intercept using a high breakdown regression estimator of lmRob() from the package robust.

Also introduces R functionality for the K distribution, as an alternative to the chisq distribution. This is particularly attractive for teaching statistics; see the vignette.