Exact algorithms for 2-clustering with size constraints in the Euclidean plane. Bertoni, A., Goldwurm, M., & Lin, J. Volume 8939 , 2015.
abstract   bibtex   
© Springer-Verlag Berlin Heidelberg 2015. We study the problem of determining an optimal bipartition A,B of a set X of n points in R2 that minimizes the sum of the sample variances of A and B, under the size constraints |A| = k and |B| = n–k. We present two algorithms for such a problem. The first one computes the solution in O(n3√k log2 n) time by using known results on convexhulls and k-sets. The second algorithm, for an input X ⊂ R2 of size n, solves the problem for all k = 1, 2,..., ⌊n/2⌋ and works in O(n2 log n) time.
@book{
 title = {Exact algorithms for 2-clustering with size constraints in the Euclidean plane},
 type = {book},
 year = {2015},
 source = {Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)},
 keywords = {Algorithms for clustering,Cluster size constraints,Data analysis,Euclidean distance,Machine learning},
 volume = {8939},
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 created = {2018-08-01T13:07:25.316Z},
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 abstract = {© Springer-Verlag Berlin Heidelberg 2015. We study the problem of determining an optimal bipartition A,B of a set X of n points in R<sup>2</sup> that minimizes the sum of the sample variances of A and B, under the size constraints |A| = k and |B| = n–k. We present two algorithms for such a problem. The first one computes the solution in O(n<sup>3</sup>√k log<sup>2</sup> n) time by using known results on convexhulls and k-sets. The second algorithm, for an input X ⊂ R<sup>2</sup> of size n, solves the problem for all k = 1, 2,..., ⌊n/2⌋ and works in O(n<sup>2</sup> log n) time.},
 bibtype = {book},
 author = {Bertoni, A. and Goldwurm, M. and Lin, J.}
}

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