How to extract a string from a list and use it with dot notation

I have a list of strings, lets say

stringListUpper = ["ABC","DEF","GHI"].

I would like to extract the strings from the list and use them in dot notation. For example, I would like to assign a value to ABC.a and another value to ABC.b.

I tried something like this:

stringListUpper = ["ABC","DEF","GHI"].
stringListLower = ["abc","def","ghi"];
for i = 1:3
    for j = 1:3
        stringListUpper(i).stringListLower(j) = 1;
    end
end

Is what I'm wanting to do possible and if so, how?

[Stephen23]

https://www.mathworks.com/matlabcentral/discussions/tips/849901-tutorial-why-variables-should-not-be-named-dynamically-eval

Answer 1

[Walter Roberson]

stringListUpper = ["ABC","DEF","GHI"];
stringListLower = ["abc","def","ghi"];
for i = 1:3
    for j = 1:3
        AssignTo(stringListUpper(i) + "." + stringListLower(j), i*10+j);
    end
end

whos

  Name                 Size            Bytes  Class     Attributes

  ABC                  1x1               433  struct              
  DEF                  1x1               433  struct              
  GHI                  1x1               433  struct              
  i                    1x1                 8  double              
  j                    1x1                 8  double              
  stringListLower      1x3               274  string              
  stringListUpper      1x3               274  string              

fieldnames(ABC)

ans = 3x1 cell array
    {'abc'}
    {'def'}
    {'ghi'}

function AssignTo(name, value)
   tname = tempname() + ".m";
   fid = fopen(tname, 'w');
   fprintf(fid, "%s = %.999g;\n", name, value);
   fclose(fid);
   [filedir, filename, filext] = fileparts(tname);
   addpath(filedir);
   evalin('caller', filename)
   rmpath(filedir)
   delete(tname)
end