scipy.spatial.distance.canberra¶

scipy.spatial.distance.canberra(u, v)[source]¶

Computes the Canberra distance between two 1-D arrays.

The Canberra distance is defined as

$d(u,v) = \sum_i \frac{|u_i-v_i|} {|u_i|+|v_i|}.$

Parameters :

u : (N,) array_like

Input array.

v : (N,) array_like

Input array.

Returns :

canberra : double

The Canberra distance between vectors u and v.

Notes

When u[i] and v[i] are 0 for given i, then the fraction 0/0 = 0 is used in the calculation.