scipy.spatial.distance.sokalsneath¶

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

Computes the Sokal-Sneath dissimilarity between two boolean vectors u and v,

$\frac{R} {c_{TT} + R}$

where $c_{ij}$ is the number of occurrences of $\mathtt{u[k]} = i$ and $\mathtt{v[k]} = j$ for $k < n$ and $R = 2(c_{TF} + c_{FT})$ .

Parameters :

u : ndarray

An $n$ -dimensional vector.

v : ndarray

An $n$ -dimensional vector.

Returns :

d : double

The Sokal-Sneath dissimilarity between vectors u and v.