Standard Errors for Contrasts among Model Terms - Generic Function
DESCRIPTION:
Returns the standard error of a specified contrast, or matrix of contrasts.
This function is an S Version 3 generic (see Methods);
method functions can be written to handle specific
S Version 3 classes of data. Classes which already
have methods for this function include:
aov
,
aovlist
USAGE:
se.contrast(x, contrast.obj, ...)
REQUIRED ARGUMENTS:
x
a model object
contrast.obj
a structure specifying the contrasts. See specific methods for details.
VALUE:
a matrix of standard errors corresponding to the contrasts.