numdifftools.nd_algopy.directionaldiff¶
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numdifftools.nd_algopy.
directionaldiff
(f, x0, vec, **options)[source][source]¶ Return directional derivative of a function of n variables
Parameters: f: function
analytical function to differentiate.
x0: array
vector location at which to differentiate f. If x0 is an nxm array, then fun is assumed to be a function of n*m variables.
vec: array
vector defining the line along which to take the derivative. It should be the same size as x0, but need not be a vector of unit length.
**options:
optional arguments to pass on to Derivative.
Returns: dder: scalar
estimate of the first derivative of f in the specified direction.
See also