how to load matrices from mat file

I have 500 matrices named A1B'1....20'C'1...25' in mat format. I need to make them look like A1BiCj( where i=1:20 and j=1:25) to do function on them. does anyone knows how I can do it?!

[Azzi Abdelmalek]

What is the logic of this A1B'1....20'C'1...25' ?

[Walter Roberson]

Which MATLAB release are you using? In newer versions of MATLAB it is more difficult to fix corrupted variable names (apostrophe is not valid in variable names in MATLAB.)

[per isakson]

See http://uk.mathworks.com/matlabcentral/answers/196952-how-to-create-new-variables-in-batches-with-strcat#answer_174587

[Walter Roberson]

Are you using multiple files, or are you using multiple variables stored within one .mat file?

If you are using multiple files, then is the variable name the same in each file but the file names tell you which case it is?

If you are using multiple variables in the same file, please give at least two different existing variable names and the corresponding names you want them to become.

[Walter Roberson]

Please give at least two sample variable names inside the one .mat file, and please indicate the names you want them to become. At the moment I do not see any difference between the variable names you already have and the variable names that you want to have.

[Konark Kelaiya]

Hello

Your question is still not clear.Is it you have 500 variable stored in MAT file and all variables are A1 A2 B1 B2 C1 C2 and so on?

In this case you can use var = load('testMat.mat') ; % testMAT.mat is your MAT file

This will create a single variable as structure containing all variables from MAT file

Then after you can use concatenation to get data

data{cnt} = [var.A1 var.(['B' num2str(i)]) var.(['C' num2str(j)]];

wherein data is {}(cell) and cnt is counter ; i and j is your loops for B and C variable

[Rena Berman]

(Answers Dev) Restored edit

[Stephen23]

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

Answer 1

[Thorsten]

 load yourmatfile.mat

 for i = 1:20
   for j = 1:25
     eval(['A1(:,:,' int2str(i) ',' int2str(j) ') = A1B' int2str(i) 'C' int2str(j) ';']) 
   end
 end

Now you can access A1B10C13 as

A1(:,:,10,13)

[Stephen23]

"you can access A1B10C13 as"

 A1(:,:,10,13)

All 500 of them in loops ? How ? Hopefully not by using more bad code practices to "fix" this bad code:

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

[Thorsten]

No, just the names. Use the approach I outlined above.

[Stephen23]

Note that the EVAL documentation recommends only calling EVAL on the RHS if possible:

https://www.mathworks.com/help/matlab/ref/eval.html#mw_5adda6ae-55ea-44eb-a0c1-830d30f15eb3

which also makes this answer simpler:

for i = 1:20
    for j = 1:25
        A1(:,:,i,j) = eval(['A1B',int2str(i),'C',int2str(j)]);
    end
end

Even better would be to avoid the situation by LOADing into output variables.