Description Usage Arguments Details Author(s) Examples
Create, test for, an coerce to, mvp objects
1 2 3 4 
vars 
List of variables comprising each term of a mvp object 
powers 
List of powers corresponding to the variables of the

coeffs 
Numeric vector corresponding to the coefficients to each
element of the 
x 
Object possibly of class 
... 
Further arguments, passed to the methods 
Function mvp()
is the formal creation mechanism for mvp
objects. However, it is not very userfriendly; it is better to use
as.mvp()
in daytoday use.
Function is_ok_mvp()
checks for consistency of its arguments.
Robin K. S. Hankin
1 2 3 4 5 6 7 8 9 10 11 12 13  mvp(list("x" , c("x","y"), "a",c("y","x")),list(1,1:2,3,c(1,4)),1:4)
## Note how the terms appear in an arbitrary order, as do
## the symbols within a term.
kahle < mvp(
vars = split(cbind(letters,letters[c(26,1:25)]),rep(seq_len(26),each=2)),
powers = rep(list(1:2),26),
coeffs = 1:26
)
## again note arbitrary order of terms and symbols within a term

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