How do I feed data into a simulink model from a .m file?

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apchar 2013-4-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/73919-how-do-i-feed-data-into-a-simulink-model-from-a-m-file

评论： Gordon 2022-6-10

I've built a class project in simulink that we were supposed to do in a matlab function (I love simulink.) My model reads data from & writes data to the workspace. It works great but the prof wants it in matlab function form: y=f(x). Not a script, a function. He'll balk at anything else. The sim command lets me pass simulation parameters to the model but I don't see any way to feed a 1 million point array into an input port. How do you feed data to a simulink model from inside a matlab function?

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Morrison Tay 2018-7-10

编辑：Walter Roberson 2018-7-10

在 MATLAB Online 中打开

i have this data, how do i enter it into matlab using editor and command window to come out with my solution variable

Min Z= 1.80X1+2.0X2+0.52X3+3.6X4+12X5+0.1X6+16X7+0.32X8+26X9

Subject to

 x1+ x2+ x3+ x4+ x5+ x6+ x7+ x8 + x9 ≤ 1000
8 x1+ 42x2+ 15.30x3+ 62x4+ 92x5+ 24.38x6+ 99x9 ≤ 21
0 x1+ 1.5x2+ 3.0x3+ 9x4 ≥ 0
1x1+ 7.0x2+ 8.3x3+ 0.50x4+ 12.45x6 ≥ 0 
01x1+ 0.30x2+ 0.11x3+ 3.9x4+ 20x7+ 38x8 ≤ 0.89
25x1+ 0.65x2+ 0.65x3+ 2.54x4+ 0.23x6+  0.02x8 ≤ 0.56
25x1+ 2.67x2+ 0.55x3+ 5.03x4+ 78x5+ 1.29x6 ≤ 1.28 
16x1+ 0.58x2+ 0.2x3+ 1.92x4+ 0.35x6+ 99x9 ≤ 0.63
 3350x1+ 2300x2+ 3300x3+ 3800x4+ 2550x6 ≤ 3107
 x1+ x2+ x3+ x4+ x5+ x6+ x7+ x8+ x9 ≥ 0

Walter Roberson 2018-7-10

Morrison Tay: the original question was about Simulink. Are you trying to work with Simulink, or are you trying to do this with MATLAB?

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Answer 1

Sachin Ganjare 2013-4-29

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https://ww2.mathworks.cn/matlabcentral/answers/73919-how-do-i-feed-data-into-a-simulink-model-from-a-m-file#answer_83792

If I understand your question correctly;

Define array variable in m file with a specific name (Eg. arr_1mil). Load this file in workspace. Then, use constant block in your model with array name arr_1mil. Connect this block to the input port of matlab function block.

Hope that will solve your problem.

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Morrison Tay 2018-7-10

pls can you give me a step by step answer because i am a new user of your program

Gordon 2022-6-10

Hi,

What about the sampling time. I'm inputting a file into simulink that is sampled at a lower rate. And then it causes errors.

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Answer 2

Kaustubha Govind 2013-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/73919-how-do-i-feed-data-into-a-simulink-model-from-a-m-file#answer_83977

You can either use a From Workspace block or Import Data to Root-Level Input Ports if the data needs to be "streamed" to the model (as opposed to using a Constant block where n samples are treated as a signal of length n).