| terms.bayes {arm} | R Documentation |
This function takes a formula and some optional arguments and
constructs a terms object. The terms object can then be used to
construct a model.matrix.bayes.
## S4 method for signature 'formula':
terms.bayes(x, specials = NULL, abb = NULL, data = NULL,
neg.out = TRUE, keep.order = FALSE, simplify = FALSE,
allowDotAsName = FALSE, ...)
x |
a formula. |
specials |
which functions in the formula should be marked as
special in the terms object. |
abb |
Not implemented in R. |
data |
a data frame from which the meaning of the special symbol
. can be inferred. It is unused if there is no . in
the formula. |
neg.out |
Not implemented in R. |
keep.order |
a logical value indicating whether the terms should
keep their positions. If FALSE the terms are reordered so
that main effects come first, followed by the interactions,
all second-order, all third-order and so on. Effects of a given
order are kept in the order specified. Default is FALSE. |
simplify |
should the formula be expanded and simplified, the pre-1.7.0 behaviour? |
... |
further arguments passed to or from other methods. |
allowDotAsName |
normally . in a formula refers to the
remaining variables contained in data. Exceptionally,
. can be treated as a name for non-standard uses of formulae. |
This function is a revised version of terms.formula in
stats package. It activates the option keep.order.
It is designed for the use of bayesglm
and bayesglm.hierachical where terms might need to keep unordered.
Yu-Sung Su ys463@columbia.edu
terms, terms.object,
model.matrix.bayes,
bayesglm.