scipy.interpolate.KroghInterpolator.
derivative#
- KroghInterpolator.derivative(x, der=1)[source]#
- Evaluate a single derivative of the polynomial at the point x. - Parameters:
- xarray_like
- Point or points at which to evaluate the derivatives 
- derinteger, optional
- Which derivative to evaluate (default: first derivative). This number includes the function value as 0th derivative. 
 
- Returns:
- dndarray
- Derivative interpolated at the x-points. Shape of d is determined by replacing the interpolation axis in the original array with the shape of x. 
 
 - Notes - This may be computed by evaluating all derivatives up to the desired one (using self.derivatives()) and then discarding the rest.