scipy.spatial.distance.yule¶

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

Computes the Yule dissimilarity between two boolean n-vectors u and v, which is defined as

$\frac{R}{c_{TT} + c_{FF} + \frac{R}{2}}$

where $c_{ij}$ is the number of occurrences of $\mathtt{u[k]} = i$ and $\mathtt{v[k]} = j$ for $k < n$ and $R = 2.0 * (c_{TF} + c_{FT})$ .

Parameters :

u : ndarray

An $n$ -dimensional vector.

v : ndarray

An $n$ -dimensional vector.

Returns :

d : double

The Yule dissimilarity between vectors u and v.