Extract a column from an event history object.

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Description

Extract a column from an event history object, as obtained with the function Hist.

Usage

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getEvent(object, mode = "factor", column = "event")

Arguments

object

Object of class "Hist".

mode

Return mode. One of "numeric", "character", or "factor".

column

Name of the column to extract from the object.

Details

Since objects of class "Hist" are also matrices, all columns are numeric or integer valued. To extract a correctly labeled version, the attribute states of the object is used to generate factor levels.

Author(s)

Thomas Alexander Gerds <tag@biostat.ku.dk>

See Also

Hist

Examples

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dat= data.frame(time=1:5,event=letters[1:5])
  x=with(dat,Hist(time,event))
  ## inside integer
  unclass(x)
  ## extract event (the extra level "unknown" is for censored data)
  getEvent(x)

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