HH: multicomp.reverse – R documentation

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multicomp.reverse

Force all comparisons in a "multicomp" object to have the same sign.

Description

Force all comparisons in a "multicomp" object to have the same sign. If the contrast "A-B" has a negative estimate, reverse it show the contrast "B-A" with a positive estimate. If a contrast name does not include a minus sign "-" and the contrast is reversed, then an informative message is printed.

Usage

multicomp.reverse(y, estimate.sign = 1, ...)

Arguments

`y`	`"multicomp"` object
`estimate.sign`	If `estimate.sign==1`, reverse the negatives. If `estimate.sign==-1`, reverse the positives. Both the names of the comparisons and the numerical values are reversed. If `estimate.sign==0`, return the argument.
`...`	other arguments not used.

Value

The result is a "multicomp" object containing the same contrasts as the argument but with the sign of the contrasts changed as needed.

Note

S-Plus use the multicomp functions and R uses the multcomp package.

Author(s)

Richard M. Heiberger <rmh@temple.edu>

References

Heiberger, Richard M. and Holland, Burt (2015). Statistical Analysis and Data Display: An Intermediate Course with Examples in R. Second Edition. Springer-Verlag, New York. https://www.springer.com/us/book/9781493921218

Heiberger, Richard M. and Holland, Burt (2006). "Mean–mean multiple comparison displays for families of linear contrasts." Journal of Computational and Graphical Statistics, 15:937–955.

Examples

## see example in multicomp.order

HH

Statistical Analysis and Data Display: Heiberger and Holland

v3.1-43

GPL (>= 2)

Authors

Richard M. Heiberger

Initial release

2020-11-27