[source] # Euclidean The straight line (*bee* line) distance between two points. Euclidean distance has the nice property of being invariant under any rotation. $$ Euclidean\left(a,b\right) = \sqrt {\sum _{i=1}^{n} \left( a_{i}-b_{i}\right)^2} $$ **Data Type Compatibility:** Continuous ## Parameters This kernel does not have any parameters. ## Example ```php use Rubix\ML\Kernels\Distance\Euclidean; $kernel = new Euclidean(); ``` ## References [^1]: J. K. Dixon. (1978). Pattern Recognition with Partly Missing Data.