fsolve with functions inside script

hello,

i am looking for a way to use fsolve in equations that some of the parameters are defined in the same script.

i am trying to enter A,B in the script, then use fsolve to solve a equation that is for example A+B/x

A=3;
B=2;
x0=1;
fsolve(fun,x0);
function F=fun(A,B,x)
A=A;
B=B;
F=A+B/x
end

and i am having the error that the argument in fsolve initial point is not the right size, i understand that it is because i defined fun as a function of A,B,x so it would expect an array of three values. but if i not define that way how can i put inside the function the desired values that are previously introduced(A and B)?

thanks

Answer 1

[Matt J]

A=3;
B=2;
x0=1;
fsolve(@(x)fun(A,B,x) ,x0);


function F=fun(A,B,x)
A=A;
B=B;
F=A+B/x
end

[Matt J]

See also

https://www.mathworks.com/help/matlab/math/parameterizing-functions.html