`scipy.spatial.distance._distance:russellrao`

source: build-install/usr/lib/python3.14/site-packages/scipy/spatial/distance/_distance.py:1388

Signature

def russellrao(u, v, w = None)

Summary

Compute the Russell-Rao dissimilarity between two boolean 1-D arrays.

Extended Summary

The Russell-Rao dissimilarity between two boolean 1-D arrays, u and v, is defined as

\frac{n - c _{T T}}{n}

where $c_{ij}$ is the number of occurrences of $u [k] = i$ and $v [k] = j$ for $k < n$ .

Parameters

u : (N,) array_like, bool: Input array.
v : (N,) array_like, bool: Input array.
w : (N,) array_like, optional: The weights for each value in u and v. Default is None, which gives each value a weight of 1.0

Returns

russellrao : double: The Russell-Rao dissimilarity between vectors u and v.

Examples

from scipy.spatial import distance
distance.russellrao([1, 0, 0], [0, 1, 0])
distance.russellrao([1, 0, 0], [1, 1, 0])
distance.russellrao([1, 0, 0], [2, 0, 0])

✓

0.3333333333333333

Aliases

scipy.spatial.distance.russellrao