## SFS: Similarity-First Search Seriation Algorithm

An implementation of the Similarity-First Search algorithm (SFS), a combinatorial algorithm which can be used to solve the seriation problem and to recognize some structured weighted graphs. The SFS algorithm represents a generalization to weighted graphs of the graph search algorithm Lexicographic Breadth-First Search (Lex-BFS), a variant of Breadth-First Search. The SFS algorithm reduces to Lex-BFS when applied to binary matrices (or, equivalently, unweighted graphs). Hence this library can be also considered for Lex-BFS applications such as recognition of graph classes like chordal or unit interval graphs. In fact, the SFS seriation algorithm implemented in this package is a multisweep algorithm, which consists in repeating a finite number of SFS iterations (at most n sweeps for a matrix of size n). If the data matrix has a Robinsonian structure, then the ranking returned by the multistep SFS algorithm is a Robinson ordering of the input matrix. Otherwise the algorithm can be used as a heuristic to return a ranking partially satisfying the Robinson property.

Version: |
0.1.4 |

Imports: |
Rcpp (≥ 0.12.7) |

LinkingTo: |
Rcpp, RcppArmadillo |

Suggests: |
seriation |

Published: |
2019-05-07 |

Author: |
Matteo Seminaroti [aut, cph],
Utz-Uwe Haus [aut, cre, cph],
Monique Laurent [ctb] |

Maintainer: |
Utz-Uwe Haus <uhaus at cray.com> |

License: |
GPL-3 |

NeedsCompilation: |
yes |

SystemRequirements: |
C++11 |

Citation: |
SFS citation info |

Materials: |
README |

CRAN checks: |
SFS results |

#### Documentation:

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