ComputeLambda {TaxicabCA}

L1 norm of a projection

Description

L1 norm of a projection

Usage

ComputeLambda(uFT, pResidual)

Arguments

uFT

A vector of 0s and 1s of lenght nc: (-1)^uFT is a unit vector in Linf norm

pResidual

A matrix with nc columns

Details

This function is for internal usage only.

Value

L1 norm of the pResidual x (-1)^uFT

Examples

ComputeLambda(uFT=c(FALSE,TRUE,FALSE),pResidual=matrix(1:15,nr=5,nc=3))