Plot Ridge Functions for Projection Pursuit Regression Fit

DESCRIPTION:

This plots the cross-sections of the ridge functions making up a projection pursuit regression fit.

USAGE:

plot.ppr(fit, ask, type="o", ...)

REQUIRED ARGUMENTS:

fit
A fit of class "ppr" as produced by a call to ppr.

OPTIONAL ARGUMENTS:

ask
the graphics parameter ask: see par for details. If set to True will ask between the plot of each cross-section.
type
the type of line to draw
...
further graphical parameters

SIDE EFFECTS:

A series of plots are drawn on the current graphical device, one for each term in the fit.

SEE ALSO:

,

EXAMPLES:

attach(rock)
area1 <- area/10000; peri1 <- peri/10000
rock.ppr <- ppr(log(perm) ~ area1 + peri1 + shape,
                data=rock, nterms=2, max.terms=5)
par(mfrow=c(1,2), pty="s")
plot(rock.ppr)
plot(update(rock.ppr, bass=5))
plot(update(rock.ppr, sm.method="gcv", gcvpen=2))