polynWithRootsVal

LIB > almafa > engine > func-1 > polynWithRootsVal

polynWithRootsVal(r, x)

import almafa.engine.func-1

Calculates the value of the normalised polynomial with prescribed roots at x.

r	Vector of roots
x	The polynomial is evaluated at this point.
return value	The value of evaluation.

In comparison, the function polynForRoots constructs the actual polynomial.

import almafa.engine.func-1;


  x0 = [5,8,444,827];
  eps = (max(x0)-min(x0))/200;
  x = min(x0)-2*eps..eps..max(x0)+2*eps;
  y = (@(x) polynWithRootsVal(x))(#x);
  plot(x,y)