Methods for Function plot

Methods for function plot to produce different diagonostic plots for an object of class "MultiChainLadder".

Usage

# S4 method for class 'MultiChainLadder,missing'
plot(x, y, which.plot=1:4, 
            which.triangle=NULL, 
            main=NULL,  
            portfolio=NULL,
            lowess=TRUE, 
            legend.cex=0.75,...)

Arguments

x: An object of class "MultiChainLadder".
y: "missing"
which.plot: This specifies which type of plot is desired. Its range is 1:5, but defaults to 1:4. "1" is the barplot of observed losses and predicted IBNR stacked and MSE predictions as error bars; "2" is a trajectory plot of the development pattern; "3" is the residual plot of standardized residuals against the fitted values; "4" is the Normal-QQ plot of the standardized residuals. "5" is the "xyplot" of development with confidence intervals for each accident year. Note that "3" and "4" are not available for portfolio.
which.triangle: This specifies which triangles are to be plotted. Default value is NULL, where all triangles plus the portfolio result will be plotted.
main: It should be a list of titles for each plot. If not supplied, use default titles.
portfolio: It specifies which triangles are to be summed as the portfolio, to be passed on to summary.
lowess: Logical. If TRUE, smoothing lines will be added on residual plots.
legend.cex: plotting parameter to be passes on to cex in legend if which.plot=1.
...: optional graphical arguments.

Examples

if (FALSE) { # \dontrun{
data(liab)
fit.liab <- MultiChainLadder(liab)

# generate diagonostic plots
par(mfcol=(c(3,2)))
plot(fit.liab,which.plot=1:2)

par(mfrow=(c(2,2)))
plot(fit.liab,which.plot=3:4)

plot(fit.liab,which.triangle=1,which.plot=5)
graphics.off()
} # }

Usage

Arguments

See also

Examples