Is it possible to draw a line across all plots in a stackedplot?

figure;
chans = 10;
for subplotN=1:chans-1 %plot first set of time-series
    x = 1:2841;
    y(:,subplotN) = randn(2841,1)*50;
end
y(:,subplotN+1) = randn(1,2841)*1e6;
stackedplot(x,y)

Is it possible to draw vertical lines across all stackedplots like in the figure below?

Answer 1

[Ameer Hamza]

I am not sure if there is any direct option, but you can use annotation() to draw a line on the figure window such that it appears on the axes at correct locations. Following code shows an example

figure;
chans = 10;
for subplotN=1:chans-1 %plot first set of time-series
    x = 1:2841;
    y(:,subplotN) = randn(2841,1)*50;
end
y(:,subplotN+1) = randn(1,2841)*1e6;
s = stackedplot(x,y);
pos = s.Position;
xlims = s.xlim;

line_locations = [500 1000 1500 2000 2500];
line_locations_norm = interp1(xlims, cumsum(pos([1 3])), line_locations);

for i=1:numel(line_locations_norm)
    annotation('line', ...
        [line_locations_norm(i) line_locations_norm(i)], ...
        [pos(2) pos(2)+pos(4)], ...
        'Color', 'r', ...
        'LineWidth', 1);
end

[Bryan Conklin]

Thanks, that works! I modified slightly to stop the lines from going in to the bottom plot.

Do you know if it's possible to remove the white background, tickmarks and alter the tick labels like in the example image? This was much easier with subplot when I could access axis handles. Thank you for your time.

[Ameer Hamza]

The stacked plot was recently introduced, and still, several options are not supported. For example, it is not possible to change the background color or make the axes invisible. I created a similar plot using subplots(). Try this

figure;
chans = 10;
for subplotN=1:chans-1 %plot first set of time-series
    x = 1:2841;
    y(:,subplotN) = randn(2841,1)*50;
end
y(:,subplotN+1) = randn(1,2841)*50;

labels = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'};

ax = gobjects(1, 10);
for i=1:10
    ax(i) = subplot(10,1,i);
    plot(x, y(:,i));
    ax(i).Color = 'none';
    ax(i).XAxis.Visible = 'off';
    ax(i).YAxis.Visible = 'off';
    ylabel(labels{i}, 'Visible', 'on');
    ax(i).Position(4) = 0.07;
    ax(i).XLim = [min(x) max(x)];
end

pos(1:3) = ax(10).Position(1:3);
pos(4) = sum(ax(1).Position([2 4])) - ax(10).Position(2);
xlims = ax(1).XLim;

line_locations = [500 1000 1500 2000 2500];
line_locations_norm = interp1(xlims, cumsum(pos([1 3])), line_locations);

for i=1:numel(line_locations_norm)
    annotation('line', ...
        [line_locations_norm(i) line_locations_norm(i)], ...
        [pos(2) pos(2)+pos(4)], ...
        'Color', 'r', ...
        'LineWidth', 1);
end

[Bryan Conklin]

Thanks Ameer! I was able to modify that approach to end up with the subplot I needed.

[Ameer Hamza]

Glad to be of help.