Attempting to completely fill out an array(6,7) with 1's and 2's for connect4

clc,clf
col = 1;
row = 1;
board = zeros(6,7); %Creates a board of zeros
maxturns = 0;
while maxturns <= 42
    maxturns = maxturns + 1; %increments maxturns by 1 each time pcOne puts a 1 on the board
    pcOne = randi(7); % pcOne generates a number 1-7
    col = pcOne; %pcOne sends the number to col to place 1 in the correct column
    while (board(row,col)~=0)%loops the input of row and col to ensure it isnt replacing a number that is already in place
    pcOne = randi(7);    
    col = randi(7);
    end
    row = 6; %starts the row at the bottom of the array
    played = 0;
        while (played == 0)
             if board(row,col) == 0
             board(row,col) = 1; % if board space = 0 then it is replaced with a 1
             played = 1; %when the loop is true played will equal 1 and exit the loop
             end
          row = row - 1; %will reduce the row to 5 if 6 is full in the respected column
         
        end
  maxturns = maxturns + 1; %adds to the max turns
    pcTwo = randi(7);
    col = pcTwo;
    while (board(row,col)~=0)%iniates when a board has a number in the row,col spot
    pcTwo = randi(7); %generates a column value for the array 
    col = pcTwo;
    end
    row = 6;
    played = 0;
        while (played == 0)%ends after the board finds a 0 
             if board(row,col) == 0
             board(row,col) = 2;%replaces a 0 in the array with a 2
             played = 1;
             end
          row = row - 1;%if bottom row in the selected column it will move up a row
        end
           
disp(board); %should display a board full of 1' and 2's
end% loop ends after 42 moves are made

RESULTS:

     0     0     0     0     0     0     0
     0     0     0     2     0     0     0
     2     1     0     2     0     0     0
     2     2     0     1     1     2     1
     1     2     1     1     2     1     2
     2     1     2     1     1     2     1

Index in position 1 is invalid. Array indices must be positive integers or logical values.
    Error in ConnectFour (line 27)
    while (board(row,col)~=0)

Answer 1

[James Tursa]

Maybe you could explain what your code is supposed to be doing. Commenting the code would be great. But if you just want a board with all 1's, then

board = ones(6,7);

Answer 2

[David Hill]

If you want an array of ones (6x7)

ones(6,7);

Otherwise, I don't understand your question.