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i have a project to make a integral with matlab

when i make a code i have an error. this is the code

f = str2double(get(edit1,'string'));

a = str2double(get(edit2,'string'));

b = str2double(get(edit3,'string'

chose = get(popup1,'value');

switch pilihan

case 1

f=@x;

case 2

f=@y;

end;

f=quad(f,a,b);

if a >= b

disp('you.re wrong!!!!!!');

end

and i get error in

??? Undefined function or method 'x' for input arguments of type 'double'.

Error in ==> quad at 77

y = f(x, varargin{:});

Error in ==> luas1b at 13

f=quad(f,a,b);

??? Error while evaluating uicontrol Callback

and i want to ask 1 more if i want to plot with unknown function do you know what is the code

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# MATLAB Make a integral with matlab

Can you offer guidance or do you also need help?

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