if matlab does not signal me any error but in the .exe file does not work how can I write this code in another way?

Question

Erwin Avendaño 2017-11-6

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评论： Karan Gill 2017-11-6

How could I write this code in another way? Do you need the str2double? I put it to get the numerical value

function pushbutton3_Callback(~, ~, handles)
syms x %variable simbolica x
f=get(handles.edit8,'string');
xl=str2double(get(handles.edit3,'string'));
xu=str2double(get(handles.edit5,'string'));
tol=str2double(get(handles.edit4,'string'));
E=100;
xa=100;
i=0;
while(tol<E)
  xr=(xl+xu)/2;
  fxl=subs(f,x,xl);
  fxr=subs(f,x,xr);
  m=fxl*fxr;
  if(m)<0
        xu=xr;
    else
        xl=xr;
    end
    E=abs(xr-xa);
    xa=xr;
    i=i+1;
end
xr;
vpa(E,5)
set(handles.edit6,'string',xr);
set(handles.edit9,'string',E);
% --- Executes on button press in pushbutton4.

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Answer 1

Steven Lord 2017-11-6

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You're using functions from Symbolic Math Toolbox (in particular syms, subs, and vpa.) Symbolic Math Toolbox is not eligible for use with MATLAB Compiler.

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Erwin Avendaño 2017-11-6

What should I do then? What commands can you use to declare that it is a symbolic variable?

Karan Gill 2017-11-6

User opened question: https://www.mathworks.com/matlabcentral/answers/365439-another-way-to-compile-my-guide-without-using-the-matlab-compiler

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Answer 2

Walter Roberson 2017-11-6

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The cause of this is the same as https://www.mathworks.com/matlabcentral/answers/365294-does-my-code-have-an-error#answer_289606 . It even looks to me as if that is a duplicate question . Duplicate questions keep the volunteers spending time cleaning up questions instead of spending time answering the questions.

Not even a tiny bit of the Symbolic Toolbox can be compiled. The program will crash as soon as it encounters 'syms' or 'subs' or 'vpa'.

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Erwin Avendaño 2017-11-6

Ok, I understand, if I'm sorry it was a double question, I felt desperate to get an answer. So this code is not to make it executable? Okay, how could I make a code for an executable? Could you show me an example of how an executable code is?

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