Plot an Object of the "Psi Function" Class — plot-methods • robustbase

The plot method objects of class psi_func simply visualizes the \(\rho()\), \(\psi()\), and weight functions and their derivatives.

# S4 method for class 'psi_func'
plot(x, y,
     which = c("rho", "psi", "Dpsi", "wgt", "Dwgt"),
     main = "full", <!-- % shortMain = FALSE, -->
     col = c("black", "red3", "blue3", "dark green", "light green"),
     leg.loc = "right", ...)

Arguments

x: object of class psi_func to be plotted
y: (optional) vector of abscissa values (to plot object at).
which: character vector of slots to be included in plot; by default, all of the slots are included
main: string or logical indicating the kind of plot title; either "full", "short" or FALSE which chooses a full, a short or no main title at all.

col: colors to be used for the different slots
leg.loc: legend placement, see also x argument of legend
...: passed to matplot

Note

An earlier version had argument shortMain which is deprecated now. Use main = "short" instead of shortMain = TRUE.

If you want to specify your own title, use main=FALSE, and a subsequent title(...) call.

See also

psiFunc() and the class psi_func.

Examples

plot(huberPsi)

plot(huberPsi, which=c("psi", "Dpsi", "wgt"),
     main="short", leg = "topleft")


plot(hampelPsi)

## Plotting aspect ratio = 1:1 :
plot(hampelPsi, asp=1, main="short",
     which = c("psi", "Dpsi", "wgt", "Dwgt"))