Problems for processing (matrice multiplication) large arrays

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Hello @Altenbach,

Thank you for all these approaches, you saved my program ! I'm just a physicist using the hadamard basis approach for my measurements, then I found that matlab algo written by someone. I made different tests and it was what I was looking for, so I decided to implement it on my labview setup. But now that we are talking I noticed that I was a bit lazy, I could try to understand how all this algorithm works and make something myself.

From your advices and your last proposition (which was exactly what I needed), I understood more the algorithm and make something more simpler.

You are my hero 🙂

Actually I use all your ideas: I8, indexing, and using the initial Hadamard matrix to get the basis.

for the algorithm, it's named the "Hadamard transform" .

https://en.wikipedia.org/wiki/Hadamard_transform.