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

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?

Answer 1

[Peng Li]

https://www.mathworks.com/matlabcentral/answers/513014-how-would-i-add-several-matrices-into-one-assembling-global-stiffness-matrix-for-fea