Description Usage Arguments Details Value Author(s) See Also Examples

In a DAG, CPDAG, MAG or PAG determine which nodes are (possible) ancestors of x on definite status or just any paths potentially avoiding given nodes on the paths.

1 2 |

`m` |
Adjacency matrix in coding according to type. |

`x` |
Node positions of starting nodes. |

`y` |
Node positions of nodes through which a path must not go. |

`possible` |
If |

`ds` |
If |

`type` |
Type of adjacency matrix in |

Not all possible combinations of the arguments are currently implemented and will issue an error if called.

Vector of all node positions found as (possible) ancestors of the nodes in `x`

.

Markus Kalisch

1 2 3 4 5 6 7 | ```
## a -- b -> c
amat <- matrix(c(0,1,0, 1,0,1, 0,0,0), 3,3)
colnames(amat) <- rownames(amat) <- letters[1:3]
plot(as(t(amat), "graphNEL"))
possAn(m = amat, x = 3, possible = TRUE, ds = FALSE, type = "pdag") ## all nodes
possAn(m = amat, x = 3, y = 2, possible = TRUE, ds = FALSE, type = "pdag") ## only node 1
``` |

pcalg documentation built on June 5, 2018, 1:05 a.m.

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