2000 character limit reached
A deterministic algorithm for fitting a step function to a weighted point-set (1109.1152v2)
Published 6 Sep 2011 in cs.DS and cs.CG
Abstract: Given a set of n points in the plane, each point having a positive weight, and an integer k>0, we present an optimal O(n \log n)-time deterministic algorithm to compute a step function with k steps that minimizes the maximum weighted vertical distance to the input points. It matches the expected time bound of the best known randomized algorithm for this problem. Our approach relies on Cole's improved parametric searching technique.