checkGradients, but the objective function has two inputs: x and xdata?
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Benjamin Pepper
on 14 Nov 2024 at 10:21
Commented: Torsten
on 21 Nov 2024 at 21:34
I'm using lsqcurvefit with the following objective function and Jacobian:
function [f, jacF] = semiCircle(p, Q)
P0 = p(1);
Q0 = p(2);
r = p(3);
f = P0 + sqrt(r^2 - (Q-Q0).^2);
if nargout > 1 % need Jacobian
jacF = [1, (Q-Q0)./sqrt(r^2-(Q0-Q).^2), r./sqrt(r^2-(Q0-Q).^2)];
end
end
I'd like to use checkGradients to verify if the Jacobian is correct. However, all of the examples in the documentation just have objective functions with one input, the parameters 'x'. Whereas my function semiCircle has two inputs: the parameters 'p' and the xdata 'Q'. Is there a way to use checkGradients for such a function?
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Accepted Answer
Torsten
on 14 Nov 2024 at 10:31
valid = checkGradients(@(p)semiCircle(p, Q),p0)
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Benjamin Pepper
on 21 Nov 2024 at 11:39
Edited: Torsten
on 21 Nov 2024 at 21:30
Torsten
on 21 Nov 2024 at 21:34
As you said: the code works fine with R2024b.
But note that the call to "lsqcurvefit" has changed in R2023a to the actual call that you use in the code. So if your desktop MATLAB version is older than R2023a, linear constraints (A,b) are not yet accepted.
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