`scipy.spatial.distance:dice`

source: /scipy/spatial/distance.py :1343

Signature

def dice ( u , v , w = None )

Summary

Compute the Dice dissimilarity between two boolean 1-D arrays.

Extended Summary

The Dice dissimilarity between u and v, is

\frac{c _{T F} + c _{F T}}{2 c _{T T} + c _{F T} + c _{T F}}

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 1-D array.
v : (N,) array_like, bool: Input 1-D 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

dice : double: The Dice dissimilarity between 1-D arrays u and v.

Notes

This function computes the Dice dissimilarity index. To compute the Dice similarity index, convert one to the other with similarity = 1 - dissimilarity.

Examples

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

✓

Aliases

scipy.spatial.distance.dice