Optimize - Optimize in the Live Editor - MATLAB (original) (raw)

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Optimize in the Live Editor

Since R2020b

Description

The Optimize task lets you interactively optimize a nonlinear objective function or solve a nonlinear equation. The task automatically generates MATLAB® code for your live script.

Using this task, you can:

• Specify the objective function, either by writing a function or browsing for a function.
• Specify solver options.
• Run the optimization.

If you have Optimization Toolbox™ or Global Optimization Toolbox you can solve more problem types using theOptimize task, such as solve a system of nonlinear equations or optimize an objective function with nonlinear constraints. For general information about Live Editor tasks, see Add Interactive Tasks to a Live Script.

Open the Task

To add the Optimize task to a live script in the MATLAB Editor, on the Live Editor Insert tab, select .

Alternatively, in a code block in the script, type a relevant keyword, such asfminbnd. Select from the suggested command completions.

Parameters

expand all

Optimization solver that MATLAB uses to solve the problem, specified as one of these solvers:

• fminbnd — Minimize a real function of one variable on a bounded domain.
• fminsearch — Minimize a real function of several variables on an unbounded domain.
• lsqnonneg — Minimizenorm(C*x-d) subject tox ≥ 0.
• fzero — Find a real pointx where a real nonlinear function f(x) = 0.

Example: fminsearch

Function to minimize (for fminbnd orfminsearch) or to find a root (for fzero), specified as a function handle, local function name, or function file.

• Function handle — Create the function handle in the workspace. Then, in theOptimize task, select Objective function > Function handle and choose the objective function.
• Local function
  • New — In the Optimize task, selectObjective function > Local function and then click theNew button. A new function definition appears below the task. Edit the function so that it calculates the objective. Then choose the local function.
  • Existing — Select Objective function > Local function and choose the local function.
• Function file
  • New — In the Optimize task, selectObjective function > From file and then click theNew button. A new function file appears. Edit the file to calculate the objective, then save the file on the MATLAB path. Click the Browse button and select the file.
  • Existing — Choose From file then and select the file.

Tips

• For functions with extra inputs, Optimize requires you to choose the optimization variable, and to specify which workspace variables contain the fixed data inputs. This example contains three function inputs:
  
  Optimize generates code only after you specify all function inputs.
• Optimize cannot parse a function containing thevarargin input or a function that contains an error.
• If you select an objective function from a file,Optimize adds the file location to your MATLAB path.
• If Optimize has a parsing error or if multiple local functions have the same name, the list of available local functions is empty.

Version History

Introduced in R2020b