View source: R/rank.analysis.R

exact_rank_prob | R Documentation |

Performs a complete and exact rank analysis of a given partial ranking. This includes rank probabilities, relative rank probabilities and expected ranks.

```
exact_rank_prob(P, only.results = TRUE, verbose = FALSE, force = FALSE)
```

`P` |
A partial ranking as matrix object calculated with neighborhood_inclusion or positional_dominance. |

`only.results` |
Logical. return only results (default) or additionally
the ideal tree and lattice if |

`verbose` |
Logical. should diagnostics be printed. Defaults to |

`force` |
Logical. If |

The function derives rank probabilities from a given partial ranking
(for instance returned by neighborhood_inclusion or positional_dominance). This includes the
calculation of expected ranks, (relative) rank probabilities and the number of possible rankings.
Note that the set of rankings grows exponentially in the number of elements and the exact
calculation becomes infeasible quite quickly and approximations need to be used.
See `vignette("benchmarks")`

for guidelines and approx_rank_relative,
approx_rank_expected, and mcmc_rank_prob for approximative methods.

`lin.ext` |
Number of possible rankings that extend |

`mse` |
Array giving the equivalence classes of |

`rank.prob` |
Matrix containing rank probabilities: |

`relative.rank` |
Matrix containing relative rank probabilities: |

`expected.rank` |
Expected ranks of nodes in any centrality ranking. |

`rank.spread` |
Standard deviation of the ranking probabilities. |

`topo.order` |
Random ranking used to build the lattice of ideals (if |

`tree` |
Adjacency list (incoming) of the tree of ideals (if |

`lattice` |
Adjacency list (incoming) of the lattice of ideals (if |

`ideals` |
List of order ideals (if |

In all cases, higher numerical ranks imply a higher position in the ranking. That is, the lowest ranked node has rank 1.

David Schoch, Julian Müller

De Loof, K. 2009. Efficient computation of rank probabilities in posets.
*Phd thesis*, Ghent University.

De Loof, K., De Meyer, H. and De Baets, B., 2006. Exploiting the
lattice of ideals representation of a poset. *Fundamenta Informaticae*, 71(2,3):309-321.

approx_rank_relative, approx_rank_expected, mcmc_rank_prob

```
P <- matrix(c(0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, rep(0, 10)), 5, 5, byrow = TRUE)
P
res <- exact_rank_prob(P)
# a warning is displayed if only one ranking is possible
tg <- threshold_graph(20, 0.2)
P <- neighborhood_inclusion(tg)
res <- exact_rank_prob(P)
```

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