Hi,
Is there a way, documented or not, to extract the intercept term (the alpha_0
the MASS book) from a ppr() (Projection Persuit Regression) fit?
Thanks,
Vadim
## Example:
n <- 1000
data <- data.frame(x=rnorm(n), y=rnorm(n))
a <- 10
data$z <- evalq(a + atan(x + y) + rnorm(n), data)
data.ppr <- ppr(z ~ x + y, data=data, nterms=1)
## how to extract a = 10 from data.ppr?
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