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Calculate Lanczos approximation using fixed Q

Source: R/lanczos.R
lanczos_fixedQ.Rd

Recalculate Lanczos approximation using fixed Q to speed up gradient calculations

Usage

lanczos_fixedQ(Hq, Q, x = attr(Hq, "env")$x0)

Arguments

Hq

function that calculates the product H %*% q given probe q and parameters x

Q

matrix of fixed probes

x

parameter vector used when calculating the Hessian matrix