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IterationStats

apex_solver::optimizer

Struct IterationStats 

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pub struct IterationStats {
    pub iteration: usize,
    pub cost: f64,
    pub cost_change: f64,
    pub gradient_norm: f64,
    pub step_norm: f64,
    pub tr_ratio: f64,
    pub tr_radius: f64,
    pub ls_iter: usize,
    pub iter_time_ms: f64,
    pub total_time_ms: f64,
    pub accepted: bool,
}
Expand description

Per-iteration statistics for detailed logging (Ceres-style output).

Captures all relevant metrics for each optimization iteration, enabling detailed analysis and debugging of the optimization process.

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§iteration: usize

Iteration number (0-indexed)

§cost: f64

Cost function value at this iteration

§cost_change: f64

Change in cost from previous iteration

§gradient_norm: f64

L2 norm of the gradient (||J^T·r||)

§step_norm: f64

L2 norm of the parameter update step (||Δx||)

§tr_ratio: f64

Trust region ratio (ρ = actual_reduction / predicted_reduction)

§tr_radius: f64

Trust region radius (damping parameter λ for LM, Δ for Dog Leg)

§ls_iter: usize

Linear solver iterations (0 for direct solvers like Cholesky)

§iter_time_ms: f64

Time taken for this iteration in milliseconds

§total_time_ms: f64

Total elapsed time since optimization started in milliseconds

§accepted: bool

Whether the step was accepted (true) or rejected (false)

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impl IterationStats

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pub fn print_header()

Print table header in Ceres-style format

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pub fn print_line(&self)

Print single iteration line in Ceres-style format with scientific notation

Trait Implementations§

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impl Clone for IterationStats

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fn clone(&self) -> IterationStats

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for IterationStats

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

Formats the value using the given formatter. Read more

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