Triangle-class: An S4 class to represent a triangle or rectangle object.
In cascsim: Casualty Actuarial Society Individual Claim Simulator

An S4 class to represent a triangle or rectangle object.

triID: A character string to identify the triangle object.
type: A character string that indicates the triangle type, such as reportedCount, closedCount, paidLoss, and incurredLoss.
startDate: The start date for the accident year or Quarter.
frequency: A character that indicates the frequency of the triangle, "yearly" or "quarterly".
sim: A number that indicates the simulation number used to complete the rectangle. Zero means using the average value.
percentile: A number that indicates the percentile used to complete the rectangle. It is only used when sim is NA.
iRBNER: A Boolean that indicates whether open claims are simulated. If not, current information will be used for constructing rectangles. Otherwise, simulated data will be used.
iROPEN: A Boolean that indicates whether claim reopen are simulated. If not, current information will be used for constructing rectangles. Otherwise, simulated data will be used.
percentile: A number that indicates the percentile used to complete the rectangle. It is only used when sim is NA.
upper: A matrix that contains the upper triangle based on claim data.
upperkeep: A matrix that contains the upper triangle that are not simulated. It will be used to construct the rectangle for the non-simulated part.
rectangle: A matrix that contains the entire rectangle based on simulation data.