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How do I would I add several matrices into one large matrix? (Assembling a global stiffness matrix for FEA)

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Emily Heil
Emily Heil 2020-3-26
回答： Peng Li 2020-3-26
If I had several 4X4 matrices and I wanted to add them into one big matrix how might I go about this? (I am trying to create a global stiffness matrix of a bar separated into several elements by adding all of the element matrices). I've included an image that should explain what my general goal is.
I figure you would start by creating a large matrix to hold the smaller ones:
A = [1 1; 1 1];
B = [1 1; 1 1];
K = zeros(3,3);
how I would add A & B into K?

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Peng Li
Peng Li 2020-3-26

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