multicomp.reverse
Force all comparisons in a "multicomp" object to have the same sign.
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.
- Keywords
- dplot
Usage
multicomp.reverse(y, estimate.sign = 1, ...)
Arguments
- y
"multicomp"
object- estimate.sign
- If
estimate.sign==1
, reverse the negatives. Ifestimate.sign==-1
, reverse the positives. Both the names of the comparisons and the numerical values are reversed. Ifestimate.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.
References
Heiberger, Richard M. and Holland, Burt (2004b). Statistical Analysis and Data Display: An Intermediate Course with Examples in S-Plus, R, and SAS. Springer Texts in Statistics. Springer. ISBN 0-387-40270-5.
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
Examples
## see example in multicomp.order