signal (version 1.8-0)

poly: Polynomial given roots

Description

Coefficients of a polynomial when roots are given or the characteristic polynomial of a matrix.

Usage

poly(x)

Value

An array of the coefficients of the polynomial in order from highest to lowest polynomial power.

Arguments

x

a vector or matrix. For a vector, it specifies the roots of the polynomial. For a matrix, the characteristic polynomial is found.

Author

Original Octave version by Kurt Hornik. Conversion to R by Tom Short.

References

Octave Forge https://octave.sourceforge.io/

See Also

polyval, roots, conv

Examples

poly(c(1, -1))
poly(roots(1:3))
poly(matrix(1:9, 3, 3))