This is documentation for an old release of SciPy (version 0.10.1). Read this page Search for this page in the documentation of the latest stable release (version 1.15.1).

scipy.spatial.distance.sokalmichener¶

scipy.spatial.distance.sokalmichener(u, v)¶

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

$\frac{R} {S + R}$

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