How change values in n number of matrix?

Hello, I am a beginner in programming. I have a task where for example, i have 30 matrices all being a 10x10 matrix

A=[] B=[] C=[] . . . N=[]

And now i am interested in changing a55 element to one value maybe '50' in all the matrices. How can i write a code for this. Or is there a function that I can use?

Thank you in advance.

Answer 1

[Azzi Abdelmalek]

Instead of working with A,B,C, you should work like below

A=rand(5);
B=rand(5);
C=rand(5)
YourArray={A,B,C}
YourArray{1}  % is A
YourArray{2}  % is B
YourArray{3}  % is C
% to make changes
for k=1:numel(YourArray)
  YourArray{k}(5,5)=100
end
YourArray{1}

%or use eval, which is not recommanded

s='A':'N'
for k=1:numel(s)
  eval([s(k) '(5,5)=50'])
end

Answer 2

[José-Luis]

You could create this function:

function [varargout] = change_value(varargin)
varargout = cell(numel(varargin));
for ii = 1:numel(varargin)
    varargin{ii}(55) = 50;
    varargout(ii) = varargin(ii);
end

And then call it as follows:

A=rand(10);
B=rand(10);
C=rand(10);
[A B C] = change_value(A,B,C);