feat: consolidates API

src/neighbors/knn_classifier.rs

@@ -36,7 +36,7 @@ use std::marker::PhantomData;
 use serde::{Deserialize, Serialize};
 
 use crate::algorithm::neighbour::{KNNAlgorithm, KNNAlgorithmName};
-use crate::base::Predictor;
+use crate::api::{Predictor, SupervisedEstimator};
 use crate::error::Failed;
 use crate::linalg::{row_iter, Matrix};
 use crate::math::distance::euclidian::Euclidian;
@@ -139,6 +139,18 @@ impl<T: RealNumber, D: Distance<Vec<T>, T>> PartialEq for KNNClassifier<T, D> {
     }
 }
 
+impl<T: RealNumber, M: Matrix<T>, D: Distance<Vec<T>, T>>
+    SupervisedEstimator<M, M::RowVector, KNNClassifierParameters<T, D>> for KNNClassifier<T, D>
+{
+    fn fit(
+        x: &M,
+        y: &M::RowVector,
+        parameters: KNNClassifierParameters<T, D>,
+    ) -> Result<Self, Failed> {
+        KNNClassifier::fit(x, y, parameters)
+    }
+}
+
 impl<T: RealNumber, M: Matrix<T>, D: Distance<Vec<T>, T>> Predictor<M, M::RowVector>
     for KNNClassifier<T, D>
 {