causalTree-internal: Internal Functions
In swager/causalForest: Causal Trees and Forests

Internal functions, only used by packages causalTree and ipred.

pred.causalTree(fit, x)
causalTree.anova(y, offset, parms, wt)
causalTree.class(y, offset, parms, wt)
causalTree.matrix(frame)
causalTree.poisson(y, offset, parms, wt)
causalTreeco(tree, parms)

`fit`	a tree fitted by `causalTree`.
`x`	a matrix of predictors.
`y`	the responses.
`offset`	an offset, or `NULL`.
`parms`	a list of parameters, usually empty.
`wt`	case weights.
`frame`	model frame (from call to `causalTree`)
`tree`	a tree fitted by `causalTree`.

For causalTreeco the x,y plotting coordinates of the nodes.

causalTree.anova, causalTree.class and causalTree.poisson return a list with components

`y`	(adjusting for `offset` if necessary),
`parms`	as input,
`numresp`	the number of responses,
`summary`	a function to be invoked by `summary.causalTree`,
`text`	a function to be invoked by `text.causalTree`.