vt.forest: Create forest to compute difft

In prise6/aVirtualTwins: Adaptation of Virtual Twins Method from Jared Foster

Create forest to compute difft

Description

vt.forest is a wrapper of VT.forest.one, VT.forest.double and VT.forest.fold. With parameter forest.type, any of these class can be used with its own parameter.

Usage

vt.forest(forest.type = "one", vt.data, interactions = T,
  method = "absolute", model = NULL, model_trt1 = NULL,
  model_trt0 = NULL, ratio = 1, fold = 10, ...)

Arguments

forest.type	must be a character. "one" to use VT.forest.one class. "double" to use VT.forest.double. "fold" to use VT.forest.fold.
vt.data	VT.object. Can be return of vt.data() function
interactions	logical. If running VirtualTwins with treatment's interactions, set to TRUE (default value)
method	character c("absolute", "relative", "logit"). See VT.difft.
model	allows to give a model you build outside this function. Can be randomForest, train or cforest. Is only used with forest.type = "one". If NULL, a randomForest model is grown inside the function. NULL is default.
model_trt1	see model_trt0 explanation and VT.forest.double details.
model_trt0	works the same as model parameter. Is only used with forest.type = "double". If NULL, a randomForest model is grown inside the function. NULL is default. See VT.forest.double for details.
ratio	numeric value that allow sampsize to be a bit controlled. Default to 1. See VT.forest.fold.
fold	number of fold you want to construct forest with k-fold method. Is only used with forest.type = "fold". Default to 5. See VT.forest.fold
...	randomForest() function parameters. Can be used for any forest.type.

Value

VT.difft

Examples

data(sepsis)
vt.o <- vt.data(sepsis, "survival", "THERAPY", T)
# inside model :
vt.f <- vt.forest("one", vt.o)
# ...
# your model :
# library(randomForest)
# rf <- randomForest(y = vt.o$getY(),
#                    x = vt.o$getX(int = T),
#                    mtry = 3,
#                    nodesize = 15)
# vt.f <- vt.forest("one", vt.o, model = rf)
# ...
# Can also use ... parameters
vt.f <- vt.forest("one", vt.o, mtry = 3, nodesize = 15)
# ...
   

prise6/aVirtualTwins documentation built on June 9, 2025, 9:05 p.m.