SimPEG.seismic.straight_ray_tomography.Simulation.Jvec_approx# Simulation.Jvec_approx(m, v, f=None)[source]# Approximate effect of J(m) on a vector v :param numpy.ndarray m: model :param numpy.ndarray v: vector to multiply :param Fields f: fields :rtype: numpy.ndarray :return: approxJv