splineforest_split function

Custom rpart split function for spline random forests

Wrapper for split function required for the random forest functionality. This function is called once per covariate at each potential split. Implements the random selection of variables; each variable is randomly selected to be included or excluded.

splineforest_split(y, wt, x, parms = NULL, continuous)

Arguments

• y: the responses at this node
• wt: the weight of the responses
• x: the X data for this covariate
• parms: the basis matrix for the spline and the proportion of variables randomly sampled (diceProb)
• continuous: value is handled internally by rpart - tells us if this covariate is continuous or categorical (factor).