lsqnonlin for double summation cost function

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ar 2020-8-23

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编辑： Matt J 2020-8-24

采纳的回答： Matt J

Hello,

I would like to use lsqnonlin to solve the Bundle Adjustment Problem. As you can see the objective function for this problem is defined using a double summation. It it possible to use lsqnonlin to express this type of problem? It seems as though it can only optimize over a single set of residuals instead of a sum (or double sum) of them.

Thanks!

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Matt J 2020-8-24

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编辑：Matt J 2020-8-24

No, your objective function is allowed to return a residual array of any dimension.

https://www.mathworks.com/help/optim/ug/lsqnonlin.html#buuhch7-fun

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ar 2020-8-24

Thank you - do you mind expanding on how that would help my case?

I'm currently approaching this problem by just returning m*n components in my residual function.

Matt J 2020-8-24

编辑：Matt J 2020-8-24

That's fine. There's nothing more you need to do. The shape of your residual array output is absolutely not relevant to anything.

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