# shrinkage::LassoFit Shrinkage for Rust · 0.3.0 [Source]() ```rust pub struct LassoFit ``` Owned original-scale parameters, preprocessing metadata, and diagnostics. Check [`Self::termination`]() before treating a fit as converged. Diagnostics refer to the optimization-scale penalty even though coefficients use the original scale. ## Inherent implementation [Source]() ```rust impl LassoFit ``` ### `coefficients` ```rust pub fn coefficients(&self) -> &[f64] ``` [Source]() Original-scale coefficients, in training-column order. ### `dual_certificate` ```rust pub fn dual_certificate(&self) -> &[f64] ``` [Source]() Feasible dual vector `theta`, with `||X_tilde' theta||_inf <= lambda` and `sum(theta) = 0` when an intercept was fitted, up to floating-point error. At zero penalty, the certificate can be zero and its gap can be loose. ### `dual_objective` ```rust pub fn dual_objective(&self) -> f64 ``` [Source]() Gaussian dual objective `D(theta) = y' theta - n ||theta||² / 2`. ### `duality_gap` ```rust pub fn duality_gap(&self) -> f64 ``` [Source]() Nonnegative gap `G(beta_0, beta, theta) = P(beta_0, beta) - D(theta)`. ### `intercept` ```rust pub fn intercept(&self) -> f64 ``` [Source]() Original-scale intercept, including the correction for centering. ### `iterations` ```rust pub fn iterations(&self) -> usize ``` [Source]() Number of coordinate sweeps over the current working set performed. ### `kkt_violation` ```rust pub fn kkt_violation(&self) -> f64 ``` [Source]() Maximum absolute KKT violation, as defined by [`crate::Lasso::tolerance`](<15ac14ea52500c664ef11283ff8f8268bb931648138cfb39e6f72b84444fee90#method-tolerance-cfe5dcbd11d6e74acd0dd47480c46376db4c2dee46fb183f17bf0a6df47e334c>). ### `objective` ```rust pub fn objective(&self) -> f64 ``` [Source]() Final primal objective `P(beta_0, beta) = ||residual||² / (2n) + lambda * ||beta||₁`. ### `predict` ```rust pub fn predict + ?Sized>( &self, x: &M ) -> Result, FitError> ``` [Source]() Predict from raw columns in the same order as the training design. Uses original-scale parameters, without estimating new centers or scales. Empty prediction batches return an empty vector. #### Errors Returns an error for a feature-count mismatch, nonfinite input, or nonfinite prediction arithmetic. ### `preprocessing` ```rust pub fn preprocessing(&self) -> &Preprocessing ``` [Source]() Fitted training-column centers and scales. ### `reference_loss` ```rust pub fn reference_loss(&self) -> f64 ``` [Source]() Averaged loss at zero coefficients and the optimal enabled intercept. ### `stopping_criterion` ```rust pub fn stopping_criterion(&self) -> StoppingCriterion ``` [Source]() Criterion selected for this fit. ### `stopping_threshold` ```rust pub fn stopping_threshold(&self) -> f64 ``` [Source]() Threshold applied to the selected criterion. ### `stopping_value` ```rust pub fn stopping_value(&self) -> f64 ``` [Source]() Final value of the selected criterion. ### `termination` ```rust pub fn termination(&self) -> Termination ``` [Source]() Whether the fit converged or exhausted its iteration budget. ### `working_set_diagnostics` ```rust pub fn working_set_diagnostics(&self) -> &shrinkage::WorkingSetDiagnostics ``` [Source]() Work performed by heuristic feature selection, separate from safe screening. ## Implementation of Clone [Source]() ```rust impl Clone for LassoFit ``` ### `clone` ```rust fn clone(&self) -> Self ``` [Source]() ## Implementation of Debug [Source]() ```rust impl Debug for LassoFit ``` ### `fmt` ```rust fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result ``` [Source]() ## [Implementation of ValidationFit](<5d173ce7dcb2d06e349b61bf9258286c35ff88ac41d7933ce0fe0553c3337dce>) [Source]() ```rust impl ValidationFit for shrinkage::LassoFit ``` ### `predict` ```rust fn predict + ?Sized>( &self, design: &M ) -> Result, FitError> ``` [Source]() ### `termination` ```rust fn termination(&self) -> Termination ``` [Source]() ## Implementation of Freeze ```rust impl Freeze for LassoFit ``` ## Implementation of RefUnwindSafe ```rust impl RefUnwindSafe for LassoFit ``` ## Implementation of Send ```rust impl Send for LassoFit ``` ## Implementation of Sync ```rust impl Sync for LassoFit ``` ## Implementation of Unpin ```rust impl Unpin for LassoFit ``` ## Implementation of UnsafeUnpin ```rust impl UnsafeUnpin for LassoFit ``` ## Implementation of UnwindSafe ```rust impl UnwindSafe for LassoFit ``` ## Implementation of Any ```rust impl Any for T where T: 'static + ?Sized ``` ## Implementation of Borrow ```rust impl Borrow for T where T: ?Sized ``` ## Implementation of BorrowMut ```rust impl BorrowMut for T where T: ?Sized ``` ## Implementation of ByRef ```rust impl ByRef for T ``` ## Implementation of CastableFrom ```rust impl CastableFrom for DT where ST: ?Sized, DT: ?Sized ``` ## Implementation of CastableFrom ```rust impl CastableFrom for DT where ST: ?Sized, DT: ?Sized ``` ## Implementation of CloneToUninit ```rust impl CloneToUninit for T where T: Clone ``` ## Implementation of From ```rust impl From for T ``` ## Implementation of Imply ```rust impl Imply for U where T: ?Sized, U: ?Sized ``` ## Implementation of Into ```rust impl Into for T where U: From ``` ## Implementation of IntoEither ```rust impl IntoEither for T ``` ## Implementation of Pointable ```rust impl Pointable for T ``` ## Implementation of Read ```rust impl Read for T where T: ?Sized ``` ## Implementation of Same ```rust impl Same for T ``` ## Implementation of SupersetOf ```rust impl SupersetOf for SP where SS: SubsetOf ``` ## Implementation of ToOwned ```rust impl ToOwned for T where T: Clone ``` ## Implementation of TryFrom ```rust impl TryFrom for T where U: Into ``` ## Implementation of TryInto ```rust impl TryInto for T where U: TryFrom ```