File: jacobian.rb [bigdecimal: Ruby Standard Library Documentation]

Last Modified
  2019-05-06 17:14:05 -0500
Requires

## Description

require 'bigdecimal/jacobian'

Provides methods to compute the Jacobian matrix of a set of equations at a point x. In the methods below:

f is an Object which is used to compute the Jacobian matrix of the equations. It must provide the following methods:

f.values(x)

  returns the values of all functions at x

f.zero

  returns 0.0

f.one

  returns 1.0

f.two

  returns 2.0

f.ten

  returns 10.0

f.eps

  returns the convergence criterion (epsilon value) used to determine whether two values are considered equal. If |a-b| < epsilon, the two values are considered equal.

x is the point at which to compute the Jacobian.

fx is f.values(x).