Sorry for triple-posting : I seem to have a problem w/ my mail client. 

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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