hi, any tips for mapping 3 nos. of 4x4 matrix (k1, k2, k3) and i need to map it into 8x8 matrix (Kg) and their intersection should add up...

[Image Analyst]

What is your definition of "intersection"? What do the red numbers above the columns and beside the rows mean? Do you have vectors containing those red numbers? What would they be used for? And, you forgot to give the final result kg that you are wanting. Please do so.

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

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[dpb]

Use the title for a short title, don't try to ask the question there...there's a whole area available for that so don't have to be overly terse.

Besides answering the "what do I mean/want?" questions posed by IA, attach the data as a .mat file containing the arrays or at least as pastable text...

Answer 1

[Walter Roberson]

Kg = zeros(8,8);
Kg([3 4 1 2], [3 4 1 2]) = K1;
Kg([1 2 5 6], [1 2 5 6]) = Kg([1 2 5 6], [1 2 5 6]) + K2;
Kg([7 8 1 2], [7 8 1 2]) = kg([7 8 1 2], [7 8 1 2]) + K3;

[Federico III]

thank you very much... it works....