scipy.spatial.distance.canberra

scipy.spatial.distance.canberra(u, v)

Computes the Canberra distance between two n-vectors u and v, which is defined as

\sum_u \frac{|u_i-v_i|}
            {(|u_i|+|v_i|)}.

Parameters :

u : ndarray

An n-dimensional vector.

v : ndarray

An n-dimensional vector.

Returns :

d : double

The Canberra distance between vectors u and v.

Notes

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

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