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`

.

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`

.

a new argument

`matchMethod`

now offers several choices for matching location and scale of the data to the that of the test distribution.

new arguments

`legend.xy`

and`legend.cex`

let the user make some adjustment to the location and character size of the automatically constructed legend.two new functions

`hideLocation()`

and`revealLocation()`

have been added for use with the`lineup = TRUE`

case.These can also be used more broadly to obfuscate integers in some range from 1 to n. The result is a string which when evaluated will reveal the integer. The point is not encryption, but rather to prevent easy visual decoding.

when

`lineup = TRUE`

, now`qqtest()`

simply returns the string with the true location of the data obfuscated. The function`revealLocation()`

will return the numerical location of the true data. Unfortunately this slight increase in convenience also makes it slightly easier for a user to cheat and hence invalidate the lineup test.(In this case,

`qqtest()`

used to return the same in a list with named component`trueLoc`

, so any code depending on the result being a list will need to be updated.)when

`lineup = FALSE`

,`qqtest()`

now*invisibly*returns a list of named components`x`

,`y`

, and`order`

giving the horizontal and vertical locations of the points in sorted order, as well as the order vector from the input data.

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

R. Wayne Oldford (2016), “Self calibrating quantile-quantile plots”,

*The American Statistician*,*70*, pp. 74-90.https://doi.org/10.1080/00031305.2015.1090338

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.