skzeros.derivative

skzeros.derivative(z, f, w, Z, *, k=1)

Evaluate the k-th derivative of the rational function in barycentric form at points Z.

Parameters:

• z (1D array) – Support points of the rational function.

• f (1D array) – Values of the rational function at the support points.

• w (1D array) – Barycentric weights of the rational function.

• Z (ndarray) – Points at which to evaluate the rational function.

• k (int, optional) – The order of the derivative to calculate, by default 1

Returns:

out – Values of the k-th derivative of the rational function at the points Z.

Return type:

ndarray