Using extrinsic function and calling matlabfunction is very slow in simulink

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Zhikai Zhang 2020-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/543674-using-extrinsic-function-and-calling-matlabfunction-is-very-slow-in-simulink

评论： Ameer Hamza 2020-6-7

I have a complicated 6x6 sym matrix and I want to sub values into it in simulink. I generated a matlabfunction and in the simulink function block I called an extrinsic function which calls the matlabfunction generated as a varible in the workspace. But this makes my model go extremely slow, is there a better way I can integrate the 6x6 matrix into simulink? Thanks!

Note: I have tried to use matlabfunctionblock as well, but that is very slow and it took hours and didn't even finish generating the block

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Ameer Hamza 2020-6-7

The symbolic toolbox is usually slow, and calling it from Simulink using extrinsic will make the simulation very slow. If possible, you should convert it to a floating-point function type. See the function matlabFunction(): https://www.mathworks.com/help/releases/R2020a/symbolic/matlabfunction.html

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