The unit system has changed from SI units (m, s, T/m) to μm, ms, and μT/μm throughout all compartment classes and helper functions.
CylinderBundleCompartment$new() no longer accepts axis, radius,
diffusivity, n_cylinders, axis_concentration, radius_sd,
radial_model, and seed arguments. It now accepts
cylinder_compartments, a list of CylinderCompartment objects (typically
produced by rcylinders()), and infers axis, radius, and diffusivity
statistics by fitting Watson and Gamma distributions to the provided
compartments.
CylinderCompartment$new() no longer accepts radius, diffusivity, and
radial_model arguments. It now accepts a restricted_compartment argument,
an instance of a circularly-shaped compartment class (e.g.,
VanGelderenCompartment$new()).
New bvalue() function to compute the b-value from gradient pulse parameters.
New FreeCompartment class to model free unconstrained diffusion.
New GammaDistribution class providing fit(), random(), get_mean(),
get_variance(), get_shape(), and get_scale() methods.
New rcylinders() function to sample a list of CylinderCompartment objects
from Watson (axis) and Gamma (radius, diffusivity) distributions.
New SphereCompartment class to model restricted diffusion in a sphere.
New WatsonDistribution class providing fit(), random(), get_axis(),
and get_concentration() methods.
All compartment classes now expose get_parameters() and
get_parameter_names() methods inherited from the new BaseCompartment
base class.