Learn more about System Identification Toolbox

Customizing the System Identification Tool GUI

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Types of GUI Customization Displaying Warnings While You Work Saving Session Preferences Modifying idlayout.m

Types of GUI Customization

The System Identification Tool GUI lets you customize the window behavior and appearance. For example, you can set the size and position of specific dialog boxes and modify the appearance of plots.

You can save the session to save the customized GUI state.

Advanced users might choose to edit the file that controls default settings, as described in Modifying idlayout.m.

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Displaying Warnings While You Work

In the System Identification Tool GUI, select Options > Warnings to display informational dialog boxes while you work. Verify that a check mark appears to the right of Warnings.

To stop warnings from being displayed during your session, select Options > Warnings and clear the check mark.

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Saving Session Preferences

Use Options > Save preferences to save the current state of the System Identification Tool GUI. This command saves the following settings to a preferences file, idprefs.mat:

• Size and position of the System Identification Tool GUI

• Sizes and positions of dialog boxes

• Four recently used sessions

• Plot options, such as line styles, zoom, grid, and whether the input is plotted using zero-order hold or first-order hold between samples

You can only edit idprefs.mat by changing preferences in the GUI.

The idprefs.mat file is located in the same folder as startup.m, by default. To change the location where your preferences are saved, use the midprefs command with the new path as the argument. For example:

midprefs('c:\matlab\toolbox\local\')

You can also type midprefs and browse to the desired folder.

To restore the default preferences, select Options > Default preferences.

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Modifying idlayout.m

Advanced users might want to customize the default plot options by editing idlayout.m.

To customize idlayout.m defaults, save a copy of idlayout.m to a folder in your matlabpath just above the ident folder level.

Caution   Do not edit the original file to avoid overwriting the idlayout.m defaults shipped with the product.

You can customize the following plot options in idlayout.m:

• Order in which colors are assigned to data and model icons

• Line colors on plots

• Axis limits and tick marks

• Plot options, set in the plot menus

• Font size

Note   When you save preferences using Options > Save preferences to idprefs.mat, these preferences override the defaults in idlayout.m. To give idlayout.m precedence every time you start a new session, select Options > Default preferences.

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Working with Plots in the System Identification Tool GUI

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