How to get dimensions of MATLABArray using MATLABEngine with .NET

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Nolin Borrero Jr 2024-5-22

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https://ww2.mathworks.cn/matlabcentral/answers/2121541-how-to-get-dimensions-of-matlabarray-using-matlabengine-with-net

评论： Nolin Borrero Jr 2024-6-4

When using a MathWorks.MATLAB.Types.MATLABArray, how do you get the dimensions of the array? I cannot find any properties that expose it.

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Michael VanMeter 2024-6-4

编辑：Michael VanMeter 2024-6-4

在 MATLAB Online 中打开

As you pointed out there are no public members exposed for the information you seek. Why are you trying to operate on the MATLABArray class and not converting to a native .NET type?

using MathWorks.MATLAB.Engine;
using (dynamic matlab = MATLABEngine.StartMATLAB())
{
    double[,] results = matlab.magic(5.0);
    int rows = results.GetLength(0);
    int cols = results.GetLength(1);
}

Nolin Borrero Jr 2024-6-4

My goal is to be able to handle returned values without knowing the type and size ahead of time. It's looking like this just isn't possible though the more I look into it.

For my implementation, I will have a struct returned that could have different fields and values. I wanted to be able to look at the data that is returned to determine how to use it. For the sample you have there, you have to know that you are receiving a 2D double.

Right now, I'm basically going down the route where I have to assume the data returned looks exactly as expected and then just handle exceptions. In older versions of MATLAB COM and Runtime, I could see the size and types of MWArrays and handle them that way. This appears to have been removed.

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