nextnearest
Nextnearest, often written as nextnearest or next-nearest, is a term used in data analysis and computer science to refer to the second closest item to a given reference point under a defined distance metric. It is related to the concept of the nearest neighbor, but specifically identifies the first item beyond the closest one. There is no universally formal definition; in practice, the term is defined within a particular algorithm, dataset, or software system.
Computing the nextnearest typically involves finding the two smallest distances from the query point and selecting
Applications of the nextnearest include fallback decision making, redundancy in navigation or robotics, and recommendation systems
Key considerations include selecting an appropriate distance metric, handling ties when multiple items share the same