How to implement correctly a nested loop?

Paul Jimenez

2020 11 26

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Hi I'm developing a code using the most recent version of Matlab but I having trouble to figured out how to create a correct nested loop.

My code is actually quite long and for academic reasons I can not show it here, but let's say that I'm trying to nest 3 different loops: one loop to create multiple arrays with vectors inside each array, then another loop to create a set of initial conditions depending on those arrays from the previous loop and finally one loop to iterate for a fixed number of times a system of ODES, using those initial conditions. For all the loops I'm using the for coomand of course.

I tried before with 2 loops and it worked correctly but when I try to add the third loop I got several errors most of them about wrong variables and not enough input arguments, so I'm assuming that the order in which the loops are nested is not correct but I would like to hear any suggestion or if is possible an example of how you can nest multiple loops in a proper manner. I know that without a code would be very hard to find a good solution but it would be nice if someone can share any problems similar to this and how it was fixed.

Thanks

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Paul Jimenez 2020-11-27

编辑：Paul Jimenez 2020-11-27

The error that I usually get is this: Unrecognized function or variable.

Stephan 2020-11-27

This error means that you use or call a variable or function which is not defined. You could use the little arrow at the RUN button ans set "Pause in errors" active. This will help debug.

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