flo-poly
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A practical, root-focused JavaScript polynomial utility library.
22 lines (19 loc) • 518 B
text/typescript
/**
* Inverts the given polynomial by reversing the order of the coefficients,
* i.e. p(x) -> x^deg(p) * p(1/x)
*
* @param p a polynomial with coefficients given densely as an array of double
* floating point numbers from highest to lowest power, e.g. `[5,-3,0]`
* represents the polynomial `5x^2 - 3x`
*
* @example
* ```typescript
* invert([3,2,-5]); // => [-5,2,3]
* ```
*
* @doc
*/
function invert(p: number[]): number[] {
return p.slice().reverse();
}
export { invert }