L2/Euclidean Distance Metric
  • is a distance metric (𝑑) defined as 𝑑(𝑢̅,𝑣̅) = 𝐿2 = ||𝑢̅-𝑣̅||2 = ||𝑢̅-𝑣̅|| = [ 𝛴1≤𝑖≤𝑛(𝑢̅𝑖-𝑣̅𝑖)2 ](1/2) where 𝑢̅,𝑣̅are vectors in ℝ𝑛
  • utilizes the L2 Norm function