MATLAB: Doubt about matrices mxm

MATLABmatricesoperate

Good afternoon.
I am new to the forum and new to programming with matlab, and I request your help with a topic:
I have the following code lines:
M_Kele_G=inv(M_Trans)*M_Kele*M_Trans;
M_Kele_global =['MK_G',int2str(f),' = M_Kele_G'];
eval(M_Kele_global)
where the variable "f" has an initial value of 1, it is a variable that grows one unit and that is contained in a for cycle. The result shown for a certain data entry:
MK_G1 =
   500     0     0  -500     0     0
     0   120   120     0  -120   120
     0   120   160     0  -120    80
  -500     0     0   500     0     0
     0  -120  -120     0   120  -120
     0   120    80     0  -120   160
If I in the matlab editor add the following line of operation: MK_G1 + MK_G1 matlab does the correct operation by adding both matrices, however I require some code that allows me to operate different matrices that vary according to the value of "f" , something like the following multiplication of matrices:
'MK_G',int2str(f) * 'MK_G',int2str(f)
I would appreciate your help in this regard. Thank you very much.

Best Answer

See the following link:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
In short, you should rewrite your code to use cell arrays or nD arrays instead of using the variable naming scheme you are currently doing, which as you can already see makes it difficult to write good code.
E.g., instead of this mess:
for i=1:N
    eval(['MyMatrix' num2str(i) '= MyFunction(MyVariable' num2str(i) ');']);
end
You can do something like this instead:
for i=1:N
    MyMatrix{i} = MyFunction(MyVariable{i});
end
A lot nicer!
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