I am creating a stackedplot. I would like to have two data lines on each graph, but the error 'Using hold with stackedplot is not supported.' appears. Is there an alternative function to hold on/hold off?
MATLAB: Using stackedplot and hold on
graphhold onMATLABstackedplot
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> i was just wondering if they was any way i could put a linear fit line and get its data from stackedplot?
If you're creating the stackedplot then you alread have the x,y coordinates which you can use to compute the regression lines. To add those lines to the stackedplot you'll need to use undocumented methods since the axis handles are unavailable by default.
Here's a demo
% Create stacked plot
x = linspace(0,20,40); y = x(:).*[1,2,4,8]+(rand(numel(x),4)-.5)*10;h = stackedplot(x,y, 'o'); % Get slope and intercepts (slope, intercept)
coefs = arrayfun(@(i){polyfit(x,y(:,i),1)},1:size(y,2));% Add refline
ax = flipud(findobj(h.NodeChildren, 'Type','Axes')); arrayfun(@(i)refline(ax(i),coefs{i}(1),coefs{i}(2)),1:numel(ax))
If you do not have access to the raw data and only have the figure, you can get the x,y coordinates and add reference lines using,
% Create stacked plot (for demo only)
x = linspace(0,20,40); y = x(:).*[1,2,4,8]+(rand(numel(x),4)-.5)*10;h = stackedplot(x,y, 'o');drawnow()% Get figure handle, stackedplot handle, and axes handles
fig = gcf(); s = findobj(fig,'Type','stackedplot');ax = flipud(findobj(s.NodeChildren, 'Type','Axes'));% Loop through each axis, get (x,y) coordinates, compute and plot reg line
% This assumes there's only 1 group of data within each axes.
for i = 1:numel(ax) x = get(ax(i).Children,'XData'); y = get(ax(i).Children,'YData'); coef = polyfit(x,y,1); refline(ax(i),coef(1),coef(2))end
You may want to use linkprop,
hlink = linkprop([ax1 ax2], {'GridColor','GridLineStyle','GridAlpha'});
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