Plot method for a MunichChainLadder object

plot.MunichChainLadder, a method to plot the output of MunichChainLadder object. It is designed to give a quick overview of a MunichChainLadder object and to check the correlation between the paid and incurred residuals.

Usage

# S3 method for class 'MunichChainLadder'
plot(x,  mfrow=c(2,2), title=NULL, ...)

Arguments

x: output from MunichChainLadder
mfrow: see par
title: see title
...: optional arguments. See plot.default for more details.

Details

plot.MunichChainLadder shows four plots, starting from the top left with a barchart of forecasted ultimate claims costs by Munich-chain-ladder (MCL) on paid and incurred data by origin period; the barchart next to it compares the ratio of forecasted ultimate claims cost on paid and incurred data based on the Mack-chain-ladder and Munich-chain-ladder methods; the two residual plots at the bottom show the correlation of (incurred/paid)-chain-ladder factors against the paid-chain-ladder factors and the correlation of (paid/incurred)-chain-ladder factors against the incurred-chain-ladder factors.

Author

Markus Gesmann

Note

The design of the plots follows those in Quarg's (2004) paper: Gerhard Quarg and Thomas Mack. Munich Chain Ladder. Blatter DGVFM 26, Munich, 2004.

Examples

M <- MunichChainLadder(MCLpaid, MCLincurred)
#> Warning: 'loglinear' model to estimate sigma_n doesn't appear appropriate. 
#> p-value > 5.
#>  est.sigma will be overwritten to 'Mack'.
#>  Mack's estimation method will be used instead.
#> Warning: 'loglinear' model to estimate sigma_n doesn't appear appropriate. 
#> p-value > 5.
#>  est.sigma will be overwritten to 'Mack'.
#>  Mack's estimation method will be used instead.
plot(M)