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MultiPlot Graph

Plot results of multiple simulations

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  • MultiPlot Graph block

Libraries:
Robust Control Toolbox

Description

The MultiPlot Graph block displays signals in a MATLAB® figure window generated when you simulate the model. At each subsequent simulation, the block adds a new line to the figure, cycling through seven colors. This block allows you to view the results of multiple simulations on a single MATLAB figure. For instance, you can use the block with the Uncertain State Space block to visualize Monte Carlo and worst-case simulation time responses.

The input signal can be scalar or vector. If the input signal is a vector, then the block plots each component of the vector in separate axes.

To export the visible plot data to the MATLAB workspace, in the figure window, click export icon. The block exports the data in a variable having the name you specify in the Workspace variable for export parameter.

To clear the data from all axes, in the figure window, click eraser icon.

Examples

Simulate Uncertain Model at Sampled Parameter Values

Simulate Uncertain Model at Sampled Parameter Values

Simulate an uncertain model in Simulink® using the Uncertain State Space block. You can sample uncertain parameters at specified values or generate random samples. The MultiPlot Graph block lets you visualize the responses of multiple samples on the same plot.

Vary Uncertain Values Across Multiple Uncertain Blocks

Vary Uncertain Values Across Multiple Uncertain Blocks

For models with a large number of uncertain variables or multiple Uncertain State Space blocks, you can vary multiple uncertainty values simultaneously.

Ports

Input

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Providing a scalar signal creates one plot. To create multiple subplots, combine the signals you want to plot into a vector signal, using blocks such as:

Parameters

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The t-min and t-max parameters set the x-axis limits. To set different lower limits for each subplot, set t-min to a vector of the same dimensions as the input signal.

Programmatic Use

Block Parameter: tmin
Type: scalar, vector
Default: 0

The t-min and t-max parameters set the x-axis limits. To set different upper limits for each subplot, set t-max to a vector of the same dimensions as the input signal.

Programmatic Use

Block Parameter: tmax
Type: scalar, vector
Default: 20

The y-min and y-max parameters set the y-axis limits. To set different lower limits for each subplot, set y-min to a vector of the same dimensions as the input signal.

Programmatic Use

Block Parameter: ymin
Type: scalar, vector
Default: –1

The y-min and y-max parameters set the y-axis limits. To set different upper limits for each subplot, set y-max to a vector of the same dimensions as the input signal.

Programmatic Use

Block Parameter: ymax
Type: scalar, vector
Default: 1

Specify the title of the MATLAB figure that the block generates.

Programmatic Use

Block Parameter: titleString
Type: character vector
Default: ''

To export the plot data to the MATLAB workspace, in the figure window, click export icon. The block exports the data to a variable with the name you specify in this parameter. The data is saved in a struct array with the following fields:

  • time — Column vector of simulation times at which input value was logged.

  • signals — Structure with sample values that contains the fields:

    • values — Array of sample values.

    • dimensions — Sample dimensions.

    • label — Name of signal line in model.

  • blockName — Name of the MultiPlot Graph block.

Programmatic Use

Block Parameter: vnamesave
Type: character vector
Default: ''

Version History

Introduced in R2007a

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See Also