feat: extends interface of Matrix to support for broad range of types

src/math/distance/euclidian.rs

@@ -1,15 +1,17 @@
-pub fn distance(x: &Vec<f64>, y: &Vec<f64>) -> f64 {    
+use crate::math::num::FloatExt;
+
+pub fn distance<T: FloatExt>(x: &Vec<T>, y: &Vec<T>) -> T {    
     return squared_distance(x, y).sqrt();
 }
 
-pub fn squared_distance(x: &Vec<f64>,y: &Vec<f64>) -> f64 {
+pub fn squared_distance<T: FloatExt>(x: &Vec<T>,y: &Vec<T>) -> T {
     if x.len() != y.len() {
         panic!("Input vector sizes are different.");
     }
 
-    let mut sum = 0f64;
+    let mut sum = T::zero();
     for i in 0..x.len() {
-        sum += (x[i] - y[i]).powf(2.);
+        sum = sum + (x[i] - y[i]).powf(T::two());
     }
 
     return sum;
@@ -25,7 +27,7 @@ mod tests {
         let a = vec![1., 2., 3.];
         let b = vec![4., 5., 6.];             
         
-        let d_arr = distance(&a, &b);        
+        let d_arr: f64 = distance(&a, &b);        
 
         assert!((d_arr - 5.19615242).abs() < 1e-8);        
     }