R: Plot Ridge Functions for Projection Pursuit Regression Fit

plot.ppr {modreg}

R Documentation

Plot Ridge Functions for Projection Pursuit Regression Fit

Description

Plot ridge functions for projection pursuit regression fit.

Usage

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

Arguments

fit

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

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

Value

None

Side Effects

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

Examples

data(rock)
attach(rock)
area1 <- area/10000; peri1 <- peri/10000
par(mfrow=c(3,2))# maybe: , pty="s")
rock.ppr <- ppr(log(perm) ~ area1 + peri1 + shape,
                data = rock, nterms = 2, max.terms = 5)
plot(rock.ppr, main="ppr(log(perm)~ ., nterms=2, max.terms=5)")
plot(update(rock.ppr, bass=5), main = "update(..., bass = 5)")
plot(update(rock.ppr, sm.method="gcv", gcvpen=2),
     main = "update(..., sm.method=\"gcv\", gcvpen=2)")