preformat {Rborist}R Documentation

Preformatting for Training with Warm Starts

Description

Presorts and formats training frame into a form suitable for subsequent training by rfArb caller or rfTrain command. Wraps this form to spare unnecessary recomputation when iteratively retraining, for example, under parameter sweep.

Usage

## Default S3 method:
preformat(x,
                   verbose=FALSE,
                   ...)

Arguments

x

the design frame expressed as either a data.frame object with numeric and/or factor columns or as a numeric or factor-valued matrix.

verbose

indicates whether to output progress of preformatting.

...

unused.

Value

an object of class Deframe consisting of:

Author(s)

Mark Seligman at Suiji.

Examples

  ## Not run: 
    data(iris)
    pt <- preformat(iris[,-5])

    ppTry <- seq(0.2, 0.5, by= 0.3/10)
    nIter <- length(ppTry)
    rsq <- numeric(nIter)
    for (i in 1:nIter) {
      rb <- Rborist(pt, iris[,5], predProb=ppTry[i])
      rsq[i] = rb$validiation$rsq
    }
  
## End(Not run)

[Package Rborist version 0.3-7 Index]