tailTransform-package: Symmetric Transformation of Tails for Plotting Differences

In tailTransform: Symmetric Transformation of Tails for Plotting Differences

Symmetric Transformation of Tails for Plotting Differences

Description

When plotting treated-minus-control differences, after-minus-before changes, or difference-in-differences, the ttrans() function symmetrically transforms the positive and negative tails to aid plotting. The package includes an observational study with three control groups and an unaffected outcome; see Rosenbaum (2022) <doi:10.1080/00031305.2022.2063944>.

Details

The DESCRIPTION file: This package was not yet installed at build time.
Index: This package was not yet installed at build time.
The package contains five items: (i) a function ttrans() that symmetrically shortens the tails of pair differences for graphical display, (ii) three plotting functions, boxplotTT(), boxplotTTlist() and boxplotBlockDesign(), that aid in interpreting and displaying the transformed data, and (iii) an observational study aHDL with three control groups and an unaffected outcome that are intended to reveal unmeasured confounding if it is present.<doi:10.1080/00031305.2022.2063944>

Author(s)

Paul R. Rosenbaum [aut, cre]

Maintainer: Paul R. Rosenbaum <[e-mail]>

References

Rosenbaum, P. R. (2023) <doi:10.1111/biom.13558> Sensitivity analyses informed by tests for bias in observational studies. Biometrics. 9(1), 475-487.

Rosenbaum, P. R. (2022) <doi:10.1080/00031305.2022.2063944> A new transformation of treated-control matched-pair differences for graphical display. American Statistician, 76, 346-352.

Examples

data(aHDL)
attach(aHDL)
d<-hdl[grpL=="D"]-hdl[grpL=="N"]  # pair differences
tcks<-c(-100,-60,-40,-20,0,20,40,60,200)
boxplotTT(d,p=-1,qu=.95,tcks=tcks)
detach(aHDL)
rm(tcks,aHDL)

tailTransform documentation built on April 4, 2025, 5:24 a.m.