Make a legend appear depending on selctions from a uitable

I have a uitable where a figure is displayed and depending on the cells clicked, different plots appear on the figure or get deleted from it. I want to add a legend to this, that also changes depending on the choices made to reflect what is on the graph. The code is as follows, with my attempted solution.

function createMyTable2

      f = figure('Position',[100 100 900 500],'Visible','on'); %#ok<NASGU>
      ax = axes('Drawmode','Fast','Units','pixels'); %#ok<NASGU>
      hold on
      grid;

      tableData = {'Sin(x)', false; 'Cos(x)', false; 'y = x', false}; 
      columnNames = {'Function', 'Show'};

      t = uitable('Units','normalized','Position',...
                   [0.8 0.8 0.2 0.2], 'Data', tableData,...
                   'ColumnName', columnNames, ...
                   'ColumnEditable', true,...
                   'CellEditCallback', @onCellSelected2);

       plotHandles = zeros(3,1); % This first number needs to change depending on how many graphs are to be plotted

       function onCellSelected2(hObject, data) %#ok<*INUSL>

       fprintf('selecting cell (%d,%d)\n', data.Indices(1), data.Indices(2));        
       col = data.Indices(2);
           if col == 2 % if the column of checkboxes is selected
                row = data.Indices(1);   % get the row
                myData = get(t,'Data');  % get the uitable data
                isChecked = myData{row, col}; % is the checkbox checked (true) or not (false)
                if isChecked
                      if row == 1
                          x = 0:pi/6:2*pi;
                          y = sin(x);
                          hold on
                          plotHandles(row) = plot(x,y,'--','color','b'); % plot the function
                          legend('show','sin(x)','location','southwest')
                      elseif row == 2          
                          u = 0:pi/6:2*pi;
                          p = cos(u);
                          plotHandles(row) = plot(u,p,'--','color','m'); % plot the function
                          legend('show','cos(x)','location','southwest')
                      elseif row == 3
                          j = 0:1:6;
                          k = j;
                          plotHandles(row) = plot(j,k,'--','color','k'); % plot the function
                      elseif row == 2 && row == 3
                          plotHandles(row) = plot(x,y,'--','color','b',u,p,'--','color','m'); % plot the function
                          legend('show','sin(x)','cos(x)','location','southeast') % This line does nothing
                      end
                elseif ishandle(plotHandles(row))
                    delete(plotHandles(row));
                    delete(legend);
                    plotHandles(row) = 0; % delete the drawn function
                end
           end
       end

end

[Nirav Sharda]

Instead on looping for values in the row variable, you can loop on the Data property of the table which is a cell-array.

>> t.Data

This would give you a cell-array and the second column has the values if the check-boxes are ticked or not. I hope this helps.