update.safs: Update or Re-fit a SA or GA Model

Description

update allows a user to over-ride the search iteration selection process.

Usage

## S3 method for class 'gafs':
update(object, iter, x, y, ...)
## S3 method for class 'safs':
update(object, iter, x, y, ...)

Arguments

object

An object produced by gafs or safs

iter

a single numeric integer

x, y

the original training data used in the call to gafs or safs

...

not currently used

Value

an object of class gafs or safs

Details

Based on the results of plotting a gafs or safs object, these functions can be used to supersede the number of iterations determined analytically from the resamples.

Any values of ... originally passed to gafs or safs are automatically passed on to the updated model (i.e. they do not need to be supplied again to update.

Examples

Run this code

set.seed(1)
train_data <- twoClassSim(100, noiseVars = 10)
test_data  <- twoClassSim(10,  noiseVars = 10)

## A short example 
ctrl <- safsControl(functions = rfSA, 
                    method = "cv",
                    number = 3)

rf_search <- safs(x = train_data[, -ncol(train_data)],
                  y = train_data$Class,
                  iters = 3,
                  safsControl = ctrl)

rf_search2 <- update(rf_search, 
	                 iter = 1,
	                 x = train_data[, -ncol(train_data)],
                     y = train_data$Class)
rf_search2