Enum MclmcTrajectoryKind 

pub enum MclmcTrajectoryKind {
    Microcanonical,
    Euclidean,
    EuclideanEarlyThenMicrocanonical,
}

Selects which leapfrog integrator and partial momentum refresh are used by MclmcChain.

Variants

Microcanonical

Microcanonical (ESH) trajectory with isokinetic Langevin momentum refresh — original MCLMC (default).

Momentum lives on the unit sphere; the partial refresh is the isokinetic Ornstein–Uhlenbeck step that keeps ‖p‖ = 1.

Euclidean

Standard Euclidean HMC trajectory with Ornstein–Uhlenbeck partial momentum refresh.

Momentum is Gaussian N(0, I). The partial refresh is p_new = α·p + sqrt(1−α²)·z, z ~ N(0, I), α = exp(−ε/(2L)).

EuclideanEarlyThenMicrocanonical

Use the Euclidean trajectory during the early tuning window (the first trajectory_switch_fraction · num_tune draws), then switch permanently to the Microcanonical trajectory for the remainder of warmup and all post-warmup draws.

This can ease mass-matrix estimation in the early phase while still benefiting from the efficiency of the microcanonical trajectory later.

Trait Implementations

impl Clone for MclmcTrajectoryKind

fn clone(&self) -> MclmcTrajectoryKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MclmcTrajectoryKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MclmcTrajectoryKind

fn default() -> MclmcTrajectoryKind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MclmcTrajectoryKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MclmcTrajectoryKind

fn eq(&self, other: &MclmcTrajectoryKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MclmcTrajectoryKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for MclmcTrajectoryKind

impl Eq for MclmcTrajectoryKind

impl StructuralPartialEq for MclmcTrajectoryKind