`scipy.interpolate._polyint:_Interpolator1DWithDerivatives.derivatives`

Signature

def derivatives(self, x, der = None)

Evaluate several derivatives of the polynomial at the point x.

Produce an array of derivatives evaluated at the point x.

x : array_like: Point or points at which to evaluate the derivatives
der : int or list or None, optional: How many derivatives to evaluate, or None for all potentially nonzero derivatives (that is, a number equal to the number of points), or a list of derivatives to evaluate. This number includes the function value as the '0th' derivative.

d : ndarray: Array with derivatives; d[j] contains the jth derivative. Shape of d[j] is determined by replacing the interpolation axis in the original array with the shape of x.

from scipy.interpolate import KroghInterpolator

✓

KroghInterpolator([0,0,0],[1,2,3]).derivatives(0)
KroghInterpolator([0,0,0],[1,2,3]).derivatives([0,0])

✗

array([[1., 1.],
       [2., 2.],
       [3., 3.]])