Calculate the gradient of a function of several variables
using Ridders' method.
This function uses diff() to calculate the derivative
in each direction. It is therefore more accurate, but slower, than
the gradient() function. The function f is typically evaluated
between 6n and 12n times, where n is the length of x.
See the documentation for diff() for more information on this method.
This function is used in the same way as gradient().
Calculate the gradient of a function of several variables using Ridders' method.
This function uses diff() to calculate the derivative in each direction. It is therefore more accurate, but slower, than the gradient() function. The function f is typically evaluated between 6n and 12n times, where n is the length of x. See the documentation for diff() for more information on this method.
This function is used in the same way as gradient().