"plotDensity"(X, ..., xlab=NULL)
"plotDensity"(X, ..., xlab=NULL)
"plotDensity"(X, ..., xlab=NULL)
"plotDensity"(X, W=NULL, xlim=NULL, ylim=NULL, xlab=NULL, ylab="density (integrates to one)", col=1:length(X), lty=NULL, lwd=NULL, ..., add=FALSE)X.character string for labels on x and y axis.TRUE, the curves are plotted in the current plot,
otherwise a new is created.density is used to estimate the
empirical density.