Matrix product along one of the dimensions of 3D array

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Svyatoslav Kharitonov 2017-12-28

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编辑： Matt J 2024-2-13

Dear all,

I wonder whether there is simple and elegant way (avoiding FOR loops) to compute a matrix product of multidimensional (e.g. 3D) array along one of the dimensions: for instance there is a T(2x2x1000) array, and one would like to compute T(:,:,1)*T(:,:,1)*...*T(:,:,1000).

Thank you!

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Roger Stafford 2017-12-28

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在 MATLAB Online 中打开

P = prod(T,3);

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Walter Roberson 2017-12-28

That would do the equivalent of .* instead of *

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James Tursa 2017-12-28

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See this link for options:

https://www.mathworks.com/matlabcentral/answers/371421-how-to-multiply-n-matrices-without-a-for-loop-slices-of-3d-array?s_tid=answers_rc1-1_p1_MLT

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Seth Hillery 2024-2-13

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If you're using release R2020b or later, take a look at the pagemtimes function introduced in that release.

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Matt J 2024-2-13

编辑：Matt J 2024-2-13

It's not applicable, unfortunately. The OP is asking for a cumulative matrix product across the slices

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