bingham_matrix

Import in python using from mcutils.scripts.MDE.fit_dispersion import bingham_matrix

mcutils.scripts.MDE.fit_dispersion.bingham_matrix(lk1, lk2, phi, theta, psi, derivative=False)[source]

Returns the Bingham matrix after rotation

Parameters

  • lk1 – logarithm of k1

  • lk2 – logarithm of k2

  • phi – main fibre orientation in the x-y plane

  • theta – polar angle (0 for main fibre orientation in z-direction, pi/2 for main fibre orientation in x-y plane)

  • psi – rotation of the major dispersion axis around the main fibre orientation

  • derivative – also return a (5, 3, 3) derivative matrix

Returns

(3, 3) Bingham matrix (and a (5, 3, 3) matrix with derivatives if requested)