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scipy.spatial.distance.sokalsneath¶

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

Computes the Sokal-Sneath dissimilarity between two boolean 1-D arrays.

The Sokal-Sneath dissimilarity between 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 : (N,) array_like, bool

Input array.

v : (N,) array_like, bool

Input array.

Returns :

sokalsneath : double

The Sokal-Sneath dissimilarity between vectors u and v.