For loop in Simulink

Question

Mehdi 2015-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/170291-for-loop-in-simulink

评论： Carsci 2015-1-27

采纳的回答： Carsci

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Hi everyone,

I need to convert the following code to a SIMULINK model:

T = [2; 21; 22; 27; 27; 21; 18; 21; 26; 36];

for i = 1:10

C = T(i+1)/T(i);

end

I have used For Iterator Subsystem but I don't know how to apply the i variable to the model. The image of the model is attached herewith. Your help will be very much appreciated.

Mehdi

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Carsci 2015-1-19

The question is lacking some boundary information for the case N=10. Specifically the calculation can be done for i = 1 : 9 or for i = 1 : 10. If N = 10 is required what is the value of T(i+1) to be used?

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Answer 1

Carsci 2015-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/170291-for-loop-in-simulink#answer_165261

Here is a SIMULINK model that uses an Index Vector block with one-based indexing to get the ith data from T. Another Index Vector block gets the (i+1)th data using the zero-indexing option.

I used an Assignment block is used to create C as a vector of the same size as T.

The For Iterator is specified as i = 1:9 so the last value of C does not get updated but retains the initial value of 36 loaded from T at the start of the simulation.

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Answer 2

Mehdi 2015-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/170291-for-loop-in-simulink#answer_165396

编辑：Mehdi 2015-1-20

Thank you very much for your help. I made the model exactly as you depicted and used index vector and assignment blocks however, I get a 51x10 matrix for the output (C1) in the Workspace. I wonder if I have missed any settings in the assignment block. I have chosen "Index vector (port)" for Index option and "1" for the "number of output dimensions". Am I on the right track?

Thank you for your continued help.

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Carsci 2015-1-27

In the workspace you will also have the time dimension. You can try changing the simulation settings so Simulink only calculates one iteration or just decimate the matrix in matlab.

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