feat: adds new distance measures + LU decomposition

src/math/distance/mod.rs

@@ -1,9 +1,13 @@
 pub mod euclidian;
+pub mod minkowski;
+pub mod manhattan;
+pub mod hamming;
+pub mod mahalanobis;
 
 use crate::math::num::FloatExt;
 
 pub trait Distance<T, F: FloatExt>{
-    fn distance(a: &T, b: &T) -> F;
+    fn distance(&self, a: &T, b: &T) -> F;
 }
 
 pub struct Distances{    
@@ -13,4 +17,16 @@ impl Distances {
     pub fn euclidian() -> euclidian::Euclidian{
         euclidian::Euclidian {}
     }
+
+    pub fn minkowski<T: FloatExt>(p: T) -> minkowski::Minkowski<T>{
+        minkowski::Minkowski {p: p}
+    }
+
+    pub fn manhattan() -> manhattan::Manhattan{
+        manhattan::Manhattan {}
+    }
+
+    pub fn hamming() -> hamming::Hamming{
+        hamming::Hamming {}
+    }
 }