lcmc

function lcmc(cr, k): number;

Defined in: metrics/neighborhood.ts:211

Neighbourhood overlap with the chance level subtracted.

• Needs: high-dimensional data and projection. No labels.
• Range: (-1, 1], higher is better. 0 means no better than random.
• Cost: O(1), from an O(N² log N) pass.

Parameters

Parameter	Type
cr	CoRanking
k	number

Returns

number

See

Chen & Buja, JASA 104 (2009) https://doi.org/10.1198/jasa.2009.0111

Example

import { analyze, lcmc } from "@saehrimnir/sickle";

const a = analyze(data, projection);   // number[][] straight in
lcmc(a.coRanking, 20);  // 0.4652