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I'm trying to make a PDF manual for matrix multiplication with LaTeX. I'd like to generate a graphic similar to this one (from Wikipedia/Matrix multiplication):

Matrix multiplication

I guess this will be quite a bit of work, but is there another way than using the eepic package? I have read into some examples and the manual, and it seems very complex to generate a graphic like this with that package.

If there is no other way, I'll have to use eepic, but I hope someone here could point me to a package or another way.

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This reminds my on TikZ (finite) grid with character in each cell, but using matrices as Stefan suggested might be better. –  Martin Scharrer Apr 18 '11 at 20:22
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up vote 13 down vote accepted

I recommend to use TikZ and its matrix library, specifically the matrix of math nodes feature. TikZ offers a great and comprehensive manual.

Have a look at this example and its source code, written by Alain Matthes, in the TikZ example gallery: Matrix multiplication. It deals exactly with your subject.

matrix example

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Wow. This really is /exactly/ what I'm looking for. I'll translate the few words into German and I'm done. Way prettier than I thought ever possible. Thanks a ton :) –  Alexx Hardt Apr 18 '11 at 20:34
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