Calculate Hessian Matrix from Loss Function

Calculate the Hessian, eigenvalues/vecotrs, and conditional number from the Loss Function using central finite differences

calculate_hessian_eigen(mod, discdat)

Arguments

mod

class of DISCresult; output from disc

discdat

dataframe; The genetic-geographic data by deme (K). Must contain columns: smpl1, smpl2, deme1, deme2, gendist, geodist

Value

A list containing:

• Hessian: Hessian matrix

• Eigen: Eigenvalues and eigenvectors from the Hessian

• KappaH: Conditional number from Hessian matrix