spatstat.core (version 2.3-1)

sdrPredict: Compute Predictors from Sufficient Dimension Reduction

Description

Given the result of a Sufficient Dimension Reduction method, compute the new predictors.

Usage

sdrPredict(covariates, B)

Arguments

covariates

A list of pixel images (objects of class "im").

B

Either a matrix of coefficients for the covariates, or the result of a call to sdr.

Value

A list of pixel images (objects of class "im") with one entry for each column of B.

Details

This function assumes that sdr has already been used to find a minimal set of predictors based on the covariates. The argument B should be either the result of sdr or the coefficient matrix returned as one of the results of sdr. The columns of this matrix define linear combinations of the covariates. This function evaluates those linear combinations, and returns a list of pixel images containing the new predictors.

See Also

sdr

Examples

# NOT RUN {
   A <- sdr(bei, bei.extra)
   Y <- sdrPredict(bei.extra, A)
   Y
# }