HH (version 3.1-43)

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.

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.

See Also

MMC, multicomp.order

Examples

# NOT RUN {
## see example in multicomp.order
# }