~ = text(column,-rows,'x';'horizontalalignment';'center';'fontsize';20)
would have to be
[~] = text(column, -rows, 'x', 'horizontalalignment', 'center', 'fontsize', 20);
but it would make more sense to use
text(column, -rows, 'x', 'horizontalalignment', 'center', 'fontsize', 20);
Also
move = [row ,column], 'ButtonDownFcn', @lineCallback;
is not going to do what you want. You have not defined row or column at that point. If you had defined them, then you would assign to move and then display the result of the assignment (because of the comma after the assignment), and then you would create the character vetor 'ButtonDownFcn' and display it (because of the comma after it), and thne you would create a handle to lineCallback function and would then discard the handle (because of the semi-colon.)
What are you thinking that a callback is getting attached to?
Also, in your callback, neither column nor rows appears to be defined. column you might potentially get from the main script, if you were to turn it into a nested function, but rows does not appear anywhere else in your code.
