how to create an matrix that is asked for in the problem

Write Matlab code that creates a new 5x10 matrix that creates an alphabetical matrix that displays the letter of the matrix that has the HIGHEST value of the 3 matrices A,B,C from Problem #1 on an element by element basis.

I have this code so far

A = [12 3 56 78 3 4 5 10 91 21; 16 18 3 5 7 17 4 7 10 11;
    2 4 6 8 10 12 10 6 3 19; 1 22 8 9 12 7 17 5 8 10; 
    7 6 2 1 45 8 17 8 9 16];
B = [16 81 18 3 5 7 9 12 9 11; 0 2 3 7 82 6 9 15 12 10; 
    7 4 1 1 8 7 15 43 11 17; 8 3 1 0 1 0 4 5 9 16; 
    7 6 2 1 45 8 17 8 9 16];
C = [6 7 68 24 13 2 8 16 22 2; 67 13 4 5 9 11 16 12 22 1;
    13 14 15 9 64 41 12 11 10 3; 2 0 1 4 6 1 6 2 3 3;
8  5 6 4 2 5 60 25 13 3];
m = max( max (A,B), C);
vars = {'A', 'B','C',};
mask1 = m == A;
mask2 = m == B;
mask3 = m == C;
which_one = cell(size(m));
which_one(mask1) = vars(1);
which_one(~mask2) = vars(2);
which_one(mask3) =vars(1|2)

but I cant get the output that the instructor shows

 OutputMatrix = [B B C A C B B C A A;C A C B  ..  .. ..  ..  .. ..; ..  ..  ..  .. ..  ..  .. ..  ..  ..;
    ..  ..  ..  .. ..  ..  .. ..  ..  ..;  ..  ..  ..  .. ..  ..  .. ..  ..  ..;]

can can someone help/elaborate please.

[Cedric]

What have you done so far? What specific question do you have about your code?

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/359741-how-to-create-an-alphabetical-matrix

[Walter Roberson]

   OutputMatrix = [B B C A C B B C A A;C A C B  ..  .. ..  ..  .. ..; ..  ..  ..  .. ..  ..  .. ..  ..  ..;
    ..  ..  ..  .. ..  ..  .. ..  ..  ..;  ..  ..  ..  .. ..  ..  .. ..  ..  ..;]

It is not possible to get that output in MATLAB, except as by converting the entire array to character and displaying it. There are no MATLAB data types that will display character entities without apostrophes or double quotes around them.

One thing that would be possible is to have the equivalent of

OutputMatrix = ['B B C A C B B C A A';'C A C B  ..  .. ..  ..  .. ..'; '..  ..  ..  .. ..  ..  .. ..  ..  ..';
    '..  ..  ..  .. ..  ..  .. ..  ..  ..';  '..  ..  ..  .. ..  ..  .. ..  ..  ..';]

Then, disp(OutputMatrix) would display as

 B B C A C B B C A A
 C A C B etc

but you would have to disp() it to get it to show up that way.

To do this, you would have to insert the spaces between each of the array elements.