Two Stem Plots with Different Base Values on the Same Graph

I want to plot two stem plots on the same graph so that "stem1" has a base value at 0 and "stem2" has a base value at -y_shift = 1. However, when I run the code, "stem1" would start on a base value at 0 for some time before its base value at 0 changes to the same base value as "stem2" and stays at the base value of -1. Is there any way to prevent that from happening?

for k = 1:10:m % for faster animations i.e. skip frame
    
    z0 = u_approx_dirac(k,:);
    z1 = dirac(k,:);
    clf
    hold on

    plot(x, zeta(x), 'r');
    plot(x_dirac , z0 , 'k');
    stem1 = stem(x (z1 ~= 0), z1 (z1 ~= 0), 'filled', 'k');
    set(stem1, 'LineWidth', 2, 'BaseValue', 0, 'ShowBaseLine', 'off');

    time = t(1:2:k);
    ref = reflectedwave(y(1:2:k));
    dirac_ref = dirac_reflectedwave(y(2:2:k));
    plot(time, ref - y_shift, 'b');
    stem2 = stem(time (dirac_ref ~= 0), dirac_ref (dirac_ref ~= 0) - y_shift, 'filled', 'b');
    set(stem2, 'BaseValue', -y_shift, 'ShowBaseLine', 'off');
    
    legend(sprintf('t = %.6f', t(k)));
    grid on
    xlim([c d]);
    xlabel('x');
    ylim([-2 5]);
    pause(0.00001);
    
    hold off

    frame = getframe(gcf);
    writeVideo(v, frame);
end

close(v);

Answer 1

[Dan]

It seems that all the stem plots on the same axes are beholden to a common basevalue. This is step back from earlier versions of MATLAB ... to show two basevalues on the same axes, you can lay two axes on top of one another:

figure;
x = axes;
ylim([0,21])
xlim([0,11])
hold on
a=stem(1:10,'basevalue',10);
hold on
y = axes('position',x.Position);
ylim([0,21])
xlim([0,11])
set(y,'Color', 'none')
hold on
b=stem(11:20,'basevalue',20);

To get this plot: