MATLAB: Plot 2 different time data on the same axis in same graph

Question

I have 2 dataset to plot both wrt to time axis in the same plot but time data is different for both the data. on yaxis 1 I want DATA1(line) on yaxis 2 i want DATA2(buuble markers) how can i do so. I am attaching the data file

Answer 1

To overcome the merged legend issue, you can create an empty plot to make the legend entry

T = readtable('TIMEDATA.txt');
fig = gcf;
ax(1) = axes(fig,'NextPlot','add');
ax(2) = axes(fig,'NextPlot','add',...
	'XAxisLocation','top',...
    'YAxisLocation','right',...
    'Color','none');
Colors = lines(2);
for i = 1:2
	xlabel(ax(i),"Time"+i)
	ylabel(ax(i),"Data"+i)
	ax(i).XColor = Colors(i,:);
	ax(i).YColor = Colors(i,:);
end
h(1) = plot(ax(1), T.TIME1, T.DATA1, 'Displayname', 'DATA1','Color',Colors(1,:));
h(2) = plot(ax(1), nan, nan, 'Displayname', 'DATA2','Color',Colors(2,:));
% either manually set the other plot in the other axes to be the same
% h2copy = plot(ax(2),T.TIME2, T.DATA2,'Displayname','DATA2','Color',Colors(2,:));
% or do it this way if you want to keep things synced without needing to track your changes
h2copy = copyobj(h(2),ax(2));
h2copy.XData = T.TIME2;
h2copy.YData = T.DATA2;
legend(ax(1),h, 'Location', 'northwest')
% compute axes positions in a kind of naive way if you want to label the axes
pos = reshape([ax.Position],4,2)'
AxPos = [max(pos(:,1),[],1),max(pos(:,2),[],1),min(pos(:,3:4),[],1)]
set(ax,'Position',AxPos)