Root Finding Model

Class Name

• RRootFindingModel

Location in Objects Pane

• Models > Model > Generic > Root Finding

Model Description

Model Form

• This model finds the root of a general nonlinear single-variable equation

DDM Sensitivities

• No

Properties

Object Name

• Name of the object in Rt
• Allowable characters are upper-case and lower-case letters, numbers, and underscore (“_”).
• The name is unique and case-sensitive.

Display Output

• Determines whether the model is allowed to print messages to the Output Pane.

Expression

• Expression of the equation, for example:

x^2 – sin(x)

• In the expression, “x” is the unknown variable

Algorithm

• Algorithm of the solver that can be one of the following:
  Newton, Secant, Steffenson, Bisection, False Position, and Brent Dekker

Maximum Iterations

• Maximum number of iterations

Tolerance

• Acceptable error in finding the root

Initial Root

• Starting point of searching for root, used in derivative-based algorithms, namely Newton, Secant, and Steffenson.

Lower Bound

• Lower bound of the searching interval, used in bracketing algorithms, namely Bisection, False Position, and Brent Dekker.

Upper Bound

• Upper bound of the searching interval, used in bracketing algorithms, namely Bisection, False Position, and Brent Dekker.

Output

• The root of the equation
• The output is an automatically generated generic response object, which takes the object name of the model plus “Response”.

Right-click Menu

Remove

• Removes the object.