How to change the variable value while looping and plotting ode in a .m file?

Question

Yen Min Chew 2021-6-25

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回答： Ashutosh Singh Baghel 2021-8-31

I am looping and plotting two ode equations to show live graph, however, I need to change the value of variables while running my program files (.m file). I try to use if instruction but I found that the new value I input was not updated in the graphs. Any suggestion to solve this issue without using GUI? I use this code below my plotting in a for loop.

Change = input('Change? ');
    if Change==1
       A = input('Enter new A: ' ); 
     
    elseif Change==2
       B = input('Enter new B: ' );
    else 
    end    

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Scott MacKenzie 2021-6-25

编辑：Scott MacKenzie 2021-6-25

The problem you note (the new value I input was not updated in the graphs) is not related to the code in your question. If the user enters "1" for the 1st prompt then, say, "33" for the 2nd prompt, the variable A is assigned the inputed value (33) and the value of B is unchanged. I assume that is what you want. If not, try to clarify the desired behaviour.

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Answer 1

Ashutosh Singh Baghel 2021-8-31

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Hi Yen,

I understand you wish to update values of 'A' or 'B' everytime '.m' file is executed. with the problem you stated - "the new value I input was not updated in the graphs", please find an alternate approach to achieve this without 'if-else' statement.

Change = input('Change? ');
switch(Change)
    case 1
        A = input('Enter new A: ');
    case 2
        B = input('Enter new B: ');
    otherwise
        display('invalid option');
end