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bundles / scipy latest / scipy / stats / _finite_differences / _derivative

function

scipy.stats._finite_differences:_derivative

source: /scipy/stats/_finite_differences.py :69

Signature

def   _derivative ( func ,  x0 ,  dx = 1.0 ,  n = 1 ,  args = () ,  order = 3 )

Summary

Find the nth derivative of a function at a point.

Extended Summary

Given a function, use a central difference formula with spacing dx to compute the nth derivative at x0.

Parameters

func : function

Input function.

x0 : float

The point at which the nth derivative is found.

dx : float, optional

Spacing.

n : int, optional

Order of the derivative. Default is 1.

args : tuple, optional

Arguments

order : int, optional

Number of points to use, must be odd.

Notes

Decreasing the step size too small can result in round-off error.

Examples

def f(x):
    return x**3 + x**2
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_derivative(f, 1.0, dx=1e-6)
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Aliases

  • scipy.stats._distn_infrastructure._derivative