plot.ppr                package:stats                R Documentation

Plot Ridge Functions for Projection Pursuit Regression Fit

Description:

     Plot ridge functions for projection pursuit regression fit.

Usage:

     ## S3 method for class 'ppr':
     plot(x, ask, type = "o", ...)

Arguments:

       x: 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.

See Also:

     'ppr', 'par'

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)")
     detach()

