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

`Deltamatrix`

computes the Delta matrix, along with maximal
intersection intervals, for a set of intervals.

1 | ```
Deltamatrix(LR)
``` |

`LR` |
two-column matrix, each row of which stores an censoring
interval of the form |

An intersection interval is a nonempty intersection of any combination of the given intervals, and a maximal intersection interval is an intersection interval that contains no other intersection interval.

The Delta matrix is a matrix of indicators (`TRUE`

or
`FALSE`

). The rows correspond to the given interval-censored
observations, and the columns the maximal intersection intervals. A
`TRUE`

value of the (i,j)-th element means that the i-th
observation covers the j-th maximal intersection interval, and a
`FALSE`

value means the opposite.

A list with components:

`left` |
left endpoints of the maximal intersection intervals. |

`right` |
right endpoints of the maximal intersection intervals. |

`Delta` |
logical matrix, for the Delta matrix. |

Yong Wang <[email protected]>

Wang, Y. (2008). Dimension-reduced nonparametric maximum likelihood
computation for interval-censored data. *Computational
Statistics & Data Analysis*, **52**, 2388-2402.

1 2 | ```
(x = cbind(1:5,1:5*3-2))
Deltamatrix(x)
``` |

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