Out of memory error with Matlab function egm96geoid

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Gerardo Arboleda 2022-3-26

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评论： Walter Roberson 2022-3-26

The function egm96geoid crashes my simulation after nearly 3000 repetitions.

The error given is:

Out of memory.

Error in egm96geoid.m (<a href="matlab: opentoline('C:\Program Files\MATLAB\R2021b\toolbox\map\mapgeodesy\egm96geoid.m', 89)">

N = G(lat, lon);

Any ideas or suggestions?

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Gerardo Arboleda 2022-3-26

I dont have access to my code right now unfortunately. However the code is very simple.

I call the function each time step of my simulation, within an iteration there are 100 steps, roughly.

The function probably got called more than 3000 times.

I think the problem has to do with the variable G in line 89 of the function, as it is defined as a persistent variable.

Walter Roberson 2022-3-26

Your lat and lon are probably both arrays at that point. When you index an array with multiple indices, then the size of the result is the product of the sizes of the indices. For example if you were passing in lat and lon each as 1 x 4000 vectors, then G(lat,lon) would give you a 4000 x 4000 result.

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