poly2form function

Expands Design Matrix Based on Polynomials

This function takes a list of objects having class polynomial, evaluates each polynomial as a function of x, then returns the results in a matrix.

poly2form(poly.out, x)

Arguments

• poly.out: A list whose objects are of class polynomial.
• x: A vector of values for which each polynomial in poly.out is to be evaluated. ## Returns

poly.out returns a matrix whose columns are the evaluation of each polynomial in poly.out using x. ## See Also

legendre.polynomials

References

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

Examples

## Evaluating the order 5 Legendre polynomials.

require(orthopolynom)

px <- legendre.polynomials(n = 5, normalized = FALSE)
lx <- poly2form(poly.out = px, x = 1:10)

lx