An S4 class for a Window

A window class provides details on the end points of the timeline

Slots

event

a character string either start or end. Identifies the point of reference for the window

start

an endpoint object containing the days and coefficient for the start of the window

end

an endpoint object containing the days and coefficient for the end of the window

index

A character string either start or end. Identifies where the index is relative to the window