effx
(Package: Epi) :
Function to calculate effects
The function calculates the effects of an exposure on a response, possibly stratified by a stratifying variable, and/or controlled for one or more confounding variables.
When an APC-frame has been produced by apc.frame, this function draws a set of estimates from an APC-fit in the frame. An optional drift parameter can be added to the period parameters and subtracted from the cohort and age parameters.
Boxes can be drawn with text (tbox) or a cross (dbox), and arrows pointing between the boxes (boxarr) can be drawn automatically not overlapping the boxes. The boxes method for Lexis objects generates displays of states with person-years and transitions with events or rates.
Plots parameter estimates with confidence intervals, annotated with parameter names. A dot is plotted at the estimate and a horizontal line extending from the lower to the upper limit is superimposed.
foreign.Lexis
(Package: Epi) :
Create a data structures suitable for use with packages mstate, etm.
The mstate package requires input in the form of a stacked dataset with specific variable names. This is provided by msdata.Lexis. The resulting dataframe contains the same information as the result of a call to stack.Lexis.
Dates are converted to a numerical value, giving the calendar year as a fractional number. 1 January 1970 is converted to 1970.0, and other dates are converted by assuming that years are all 365.25 days long, so inaccuracies may arise, for example, 1 Jan 2000 is converted to 1999.999. Differences between converted values will be 1/365.25 of the difference between corresponding Date objects.
timeBand
(Package: Epi) :
Extract time band data from a split Lexis object
The break points of a Lexis object (created by a call to splitLexis) divide the follow-up intervals into time bands along a given time scale. The breaks function returns the break points, for a given time scale, and the timeBand classifies each row (=follow-up interval) into one of the time bands.
providing 
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