pprfuns function

Ridge Functions for Projection Pursuit Regression

The portion of the plot.ppr code that computes the ridge traces for projection pursuit regression.

ppr_funs(obj)

Arguments

• obj: A fit of class ppr as produced by the ppr function. ## Returns

ppr_funs returns the evaluated ridge trace values based on output from the ppr function. ## See Also

ppr, plot.ppr

Details

This is just the segment of code in plot.ppr, which calculates the ridge traces.

References

Young, D. S. (2017), Handbook of Regression Methods, CRC Press.

Examples

## Projection pursuit regression on the rock dataset.

data(rock)

ppr.out <- ppr(log(perm) ~ area + peri + shape,
               data = rock, nterms = 2, max.terms = 5)
obj <- ppr_funs(ppr.out)

obj