Can I display 2 legends while using the plotyy function?

I've been asked to add a 2nd legend to an existing M-file where the objective is to display altitude and SV IDs using the plotyy function. I'm working with the following code:

% Plot altitude and SV IDs with NER State Time and add title
  figure('Name','Altitude and SV IDs','numbertitle','off');
  [AX,H1,H2] = plotyy(State_Time, Alt, State_Time, SV_ID, 'plot');
  set(AX, 'Fontsize', 16, 'XTickLabel',num2str(get(gca,'XTick')','%d'));
  title(Event_Title,'FontSize', 20);

    % Define axes properties
    axes(AX(1));
    ylabel('Altitude (m)','Fontsize', 20,'fontweight','b');
    xlabel('UTC (Sec)','Fontsize', 20,'fontweight','b');
    axes(AX(2));
    ylabel('SV ID','Fontsize', 20,'fontweight','b');

    % Set the markers, markersizes, and linestyles
    set(H1,'Marker','o','MarkerSize',15);
    set(H2,'Marker','+','MarkerSize',15);
    set(H2,'LineStyle','none');

    % Add first and 2nd legends for data source
    legend(Source, 'Location', 'NortheastOutside');
    legend('SV_ID', 'Location', 'EastOutside');

I'm new to using the plotyy function and the problem I'm running into is the displaying of both legends simultaneously.

Is the displaying of both legends tied to the plotyy function itself?

Answer 1

[Azzi Abdelmalek]

legend({Source,'SV_ID'}, 'Location', 'NortheastOutside');

[Brad]

Azzi, this will definitely place both the SV_ID and Source within a single legend. Is there a way to create separate legends for each of these?

Answer 2

[Kelly Kearney]

You can only create one legend per axis (unless you use an outside function like legendflex), but in this case you already have two axes to work with, so:

[ax, h1, h2] = plotyy(1:10, rand(10,1), 1:10, rand(10,1)+10);

leg1 = legend(ax(1), 'thing1', 'Location', 'NortheastOutside');
leg2 = legend(ax(2), 'thing2', 'Location', 'EastOutside');
set(leg2, 'color', 'white');

[Cristian JECU]

This solution puts the legend 1, under the lines of the second axes. Is there a solution to bring the legend 1 of the Axes 1 on top?