How can I fix this error in my code creating a maze game?

I am trying to create a maze type game in Matlab for a class project. I am following my professor's algorithm key, but I keep getting an error when I run the function. The maze_size is supposed to be a random string array, and I am also unsure if this is correct for that. Below is the error I am receiving.

    Not enough input arguments.
    Error in create_maze (line 3)
    maze = [maze_size, maze_size];

My code is below. There will be a second function that will have the player randomly move through the "game board" and encounter monsters they will have to "fight" by guessing a correct number before moving to try and find the exit.

function maze = create_maze(maze_size, monsters)

    maze = [maze_size, maze_size];
      maze = (1:maze_size), (1:maze_size) == '0'
      maze(randX, randY) = 'P'
      tempX = maze_size(randi(numel(maze_size)))
      tempY = maze_size(randi(numel(maze_size)))

    if maze(tempX, tempY) == 'P'
        maze(tempX, tempY) = 'E';
    elseif tempX < maze_size
        maze(tempX + 1, tempY) = 'E'
    elseif tempY < maze_size
        maze(tempX, tempY + 1) = 'E';
    elseif tempX > 1
        maze(tempX - 1, tempY) = 'E';
    else
        maze(tempX, tempY - 1) = 'E';
    end

    if monsters > 0
        tempX = rand(1:maze_size);
        tempY = rand(1:maze_size);
        if maze(tempX, tempY) == 'P' && maze(tempX, tempY) == 'E'
            maze(tempX, tempY) = 'M';
        end
        tempX = rand(1:maze_size);
        tempY = rand(1:maze_size);
        if maze(tempX, tempY) == 'P' && maze(tempX, tempY) == 'E'
            maze(tempX, tempY) = 'M'
        end
    end
    end

[Image Analyst]

Try this: http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

Answer 1

[TADA]

generally this exception is thrown when you are trying to use an input argument which was not set when calling this function.

[Staci Shoemake]

I am a beginner to Matlab, and I don't understand why it is giving me this error when I am using the inputs that are in the function. It is giving me the error on the line:

maze = [maze_size, maze_size];

This line is supposed to be setting an array to the size of maze_size.

Thank you.

[Walter Roberson]

You are trying to run the code by clicking on the green Run button. You need to go down to the command line and invoke the function passing in appropriate values.