overlayCenterDots

This function takes a set of plot objects (subset) and a list of target indices (targetIdx). It overlays black dots on the original axes

This function takes a set of plot objects (subset) and a list of target indices (targetIdx). It overlays black dots on the original axes and legend.

figure;
x = 1:9;
hold on;
h1 = plot(x,   x,                    "k-",  MarkerFaceColor="w");
h2 = plot(x, 2*x,                    "k--", MarkerFaceColor="w");
h3 = plot(x,   x+0.5*randn(size(x)), "ko",  MarkerFaceColor="w");
h4 = plot(x, 2*x+0.5*randn(size(x)), "k^",  MarkerFaceColor="w");
xlabel("x-axis");
ylabel("y-axis");

subset    = [ h1    h2    h3    h4 ]; % objects displayed in legend
label     = ["h1", "h2", "h3", "h4"]; % labels for objects
targetIdx = [3 4];                    % target for adding dots

% Create legend and overlay center dots specifying the same subset
legend           (subset, label, Location="northwest");
overlayCenterDots(subset, targetIdx, [0 10], [0 20]);

exportgraphics(gcf, "example.png"); % export