Incorrect number or types of inputs and outputs for function 'isfinite'

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Weiying
Weiying 2023-9-7
评论： Weiying 2023-9-7
Ran in:
I want to solve this nonlinear system, but it always says in red: Incorrect number or types of inputs and outputs for function 'isfinite', and I'm a beginner I don't know how to fix it.
Could you please give me some advice? Thx.
x=fsolve('@system',[0 0])
Incorrect number or types of inputs or outputs for function 'isfinite'.

Error in fsolve (line 306)
if any(~isfinite(fuser))
function f=system(x)
f=[2*x(1)+x(2)+x(1)^3; x(1)+x(1)*x(2)+exp(x(1))];
end

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采纳的回答

Florian Bidaud
Florian Bidaud 2023-9-7
编辑：Florian Bidaud 2023-9-7
Ran in:
You need to remove the quotes
x=fsolve(@system,[0 0])
Equation solved. fsolve completed because the vector of function values is near zero as measured by the value of the function tolerance, and the problem appears regular as measured by the gradient.
x = 1×2
-0.3783 0.8108
function f=system(x)
f=[2*x(1)+x(2)+x(1)^3; x(1)+x(1)*x(2)+exp(x(1))];
end

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