How do I get a 3D plot (surface) from a Simulink Block (two inputs, one output)?

Question

Luca Santachiara 2016-9-29

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https://ww2.mathworks.cn/matlabcentral/answers/305040-how-do-i-get-a-3d-plot-surface-from-a-simulink-block-two-inputs-one-output

回答： Harsha Phadke 2016-10-4

I have a subsystem which has just two inputs and a single output:

I believe it's something similar to a two-variables function:

"z=f(x,y)"

which is

"Output=f(Input1,Input2)"

I'd like to get a 3D plot of the function represented by the block, a surface, something which looks like this image from the web:

How do I get that?

Thank you

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Answer 1

Swarooph 2016-10-4

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You can use the surf function in a MATLAB Function block. Read through the documentation of the MATLAB Function block to see stuff you need to do to get MATLAB visualization to work in it. For e.g. the following description from the documentation: To support visualization of data, the MATLAB Function block supports calls to MATLAB functions for simulation only. See Extrinsic Functions to understand some of the limitations of this capability, and how it integrates with code analysis for this block.

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Answer 2

Harsha Phadke 2016-10-4

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You can export the Simulink data to base workspace and then use "surf" to plot the graph for this data. Refer the documentation on the following link for more insight into Exporting Simulink Data.

Export Simulink Data