Uses the conjugate gradient method to determine a local minimum of a function of n independent variables.
Value that determines whether this node uses the derivatives in the algorithm.
Name | Value | Description |
---|---|---|
Without Derivatives | 0 | Does not use the derivatives in the algorithm. |
With Derivatives | 1 | Uses the derivatives in the algorithm. |
Default: Without Derivatives
Algorithm this node uses to compute the derivatives.
Name | Value | Description |
---|---|---|
Fletcher-Reeves | 0 | Uses the Fletcher-Reeves method. |
Polak-Ribiere | 1 | Uses the Polak-Ribiere method. |
Default: Fletcher-Reeves
Point in n dimension at which the optimization process starts.
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
Accuracy of the minimum of the formula.
The node stops running if the difference between two consecutive approximations equals to or is less than the value of accuracy.
Default: 1E-08
Local minimum in n dimension.
Function value at the local minimum.
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
The conjugate-gradient method uses the derivatives of a function to update the conjugate direction. This node uses the Fletcher-Reeves algorithm or the Polak-Ribiere algorithm to calculate the conjugate direction, depending on gradient method.
The following illustration shows a start point and a start direction. New points and new directions are calculated by this node.
Where This Node Can Run:
Desktop OS: Windows
FPGA: This product does not support FPGA devices