Given a pedigree, this function creates helper matrices that descibe the layout of a plot of the pedigree.

1 | ```
align.pedigree(ped, packed=TRUE, width=10, align=TRUE, hints=ped$hints)
``` |

`ped` |
a pedigree object |

`packed` |
should the pedigree be compressed, i.e., to allow diagonal lines connecting parents to children in order to have a smaller overall width for the plot. |

`hints` |
plotting hints for the pedigree.
This is a list with components The order component is a numeric vector with one element per subject in the pedigree. It determines the relative order of subjects within a sibship, as well as the relative order of processing for the founder couples. (For this latter, the female founders are ordered as though they were sisters). The spouse component is a matrix with one row per hinted marriage, usually only a few marriages in a pedigree will need an added hint, for instance reverse the plot order of a husband/wife pair. Each row contains the index of the left spouse, the right hand spouse, and the anchor: 1=left, 2=right, 0=either. Children will preferentially appear under the parents of the anchored spouse. |

`width` |
for a packed output, the minimum width |

`align` |
for a packed pedigree, align children under parents (TRUE), to the extent possible given the page width, or align to to the left margin (FALSE). The latter is mostly used by internal routines. |

This is an internal routine, used almost exclusively by
`plot.pedigree`

.
The subservient functions `alignped1`

,
`alignped2`

,
`alignped3`

,
and `alignped4`

contain the bulk of the computation.

a structure with components

`n` |
a vector giving the number of subjects on each horizonal level of the plot |

`nid` |
a matrix with one row for each level, giving the numeric id of each subject plotted. (An value of 17 means the 17th subject in the pedigree). |

`pos` |
a matrix giving the horizontal position of each plot point |

`fam` |
a matrix giving the family id of each plot point. A value of "3" would mean that the two subjects in positions 3 and 4, in the row above, are this subject's parents. |

`spouse` |
a matrix with values 1= subject plotted to the immediate right is a spouse, 2= subject plotted to the immediate right is an inbred spouse, 0 = not a spouse |

`twins` |
optional matrix which will only be present if the pedigree contains twins. It has values 1= sibling to the right is a monozygotic twin, 2= sibling to the right is a dizygotic twin, 3= sibling to the right is a twin of unknown zygosity, 0 = not a twin |

`plot.pedigree`

, `autohint`

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