plot 2 different time data on the same axis in same graph

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

[Walter Roberson]

See yyaxis left and yyaxis right

[Abhijit Sardar]

i am using the same but giving error. can please check the data

Answer 1

[J. Alex Lee]

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)

[Abhijit Sardar]

thank you

Answer 2

[J. Alex Lee]

or potentially you are just looking for "hold on"

[Abhijit Sardar]

no hold on does not work. i want 2 different time data to be represented on the same axis please see the attachment you will understand

Answer 3

[Walter Roberson]

T = readtable('TIMEDATA.txt');
yyaxis right
plot(T.TIME2, T.DATA2, 'Displayname', 'DATA2')
yyaxis left
plot(T.TIME1, T.DATA1, 'Displayname', 'DATA1')
legend show

[Walter Roberson]

You might notice that is not very useful. The reason is that you used a single x axes even though the x values are fairly different.

T = readtable('TIMEDATA.txt');
fig = gcf;
ax1 = axes(fig);
h(1) = line(ax1, T.TIME1, T.DATA1, 'Displayname', 'DATA1', 'color', 'k');
legend(h(1), 'Location', 'northwest')

ax1_pos = ax1.Position; % position of first axes
ax2 = axes('Position',ax1_pos,...
    'XAxisLocation','top',...
    'YAxisLocation','right',...
    'Color','none');
h(2) = line(T.TIME2, T.DATA2, 'parent', ax2, 'Displayname', 'DATA2', 'color', 'b');

legend(h(2), 'Location', 'northeast')

Unfortunately in order to get the axes in the right location, it becomes a challenge to get a merged legend.