Need help to make a for loop

I got a K (5x5) matrix all zeros K1 (3x3) is associated with 1,2,3 K2 (3x3) is associated with 3,4,5

I Need to add K1 and K2 in a for loop to make a 5x5 matrix

[Walter Roberson]

Do you mean the equivalent of

result = zeros(5,5);
result(1:3, 1:3) = K1;
result(3:5,3:5) = result(3:5,3:5) + K2;

?

[Ibrahim Mahmood Shah]

I guess, very similar to that ...what if i have K1..k2..k3..till k100

[Walter Roberson]

If you have K1..k2..k3..till k100 then you rewrite your code so that you do not have those.

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Stephen23]

Read these:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

https://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

And this quote from the MATLAB documentation: "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended"

Then use indexing instead of dynamic variable names: indexing is simple, fast, efficient, and much less buggy.