caret_gafs: Methods for Function 'gafs'

In hsdar: Manage, Analyse and Simulate Hyperspectral Data

Methods for Function gafs

Description

Methods for function gafs in package caret. Please refer to help pages in the caret-package for further information.

Usage

## S4 method for signature 'Speclib'
gafs(x, y, cutoff = 0.95, returnData = TRUE, na.rm = FALSE, ...)

## S4 method for signature 'Nri'
gafs(x, y, cutoff = 0.95, returnData = TRUE, na.rm = FALSE, ...)

## S4 method for signature 'Specfeat'
gafs(x, y, cutoff = 0.95, returnData = TRUE, na.rm = FALSE, ...)

get_gafs(x)

Arguments

x	Object of class Speclib, Nri or Specfeat. For get_gafs, x must be the output of gafs as Speclib or Nri.
y	A numeric or factor vector containing the outcome for each sample. If missing, the response variable set by setResponse is used.
cutoff	The cutoff value of the correlation coefficients between response variables.
returnData	Logical. If TRUE, the updated object of x is returned, otherwise only the result of gafs is returned.
na.rm	Logical. If TRUE, all variables are excluded which contain at least one non-finite value.
...	Further aruments passed to gafs.

Value

If returnData == TRUE, an object of class Speclib or Nri, otherwise an object of class gafs. Note that if x is an object of class Specfeat, the function returns an object of class Speclib containing the relevant transformed band values.

Author(s)

Lukas Lehnert

See Also

gafs

Examples

## Not run: 
data(spectral_data)

## Set response variable (Chlorophyll content)
spectral_data <- setResponse(spectral_data, "chlorophyll")

## Set additional predictor variables from the SI
spectral_data <- setPredictor(spectral_data, "season")

## Feature selection using genetic algorithms
## Note that this may take some time!
gafs_res <- gafs(spectral_data)

get_gafs(gafs_res)

## End(Not run)

hsdar documentation built on March 18, 2022, 6:35 p.m.