Hovering mouse over multiple plots

Hi All

I have multiple subplots, all with the same time stamp.

Is it possible that when i hover over one plot, i can also see the values from another plot at the same time as if i the mouse over that plot as well?

This how my plot looks:

Answer 1

[VINAYAK LUHA]

Hi Dharmesh,

It is my understanding that you have multiple subplots plotted at same timestamps in a figure. While hovering over line points in a subplot, you want to know a workaround to see the corresponding y value in another subplot at the same x values.

Here’s a possible workaround for your reference using callbacks function which gets triggered on hovering over line points and leverages MATLAB Graphics object’s hierarchical relationships to find and display y values as tooltips in the subplot from another configured subplot.

close all
time = 7:16;
data1= randi([1,50],1,10)
data2= randi([51,100],1,10)

figure;
subplot(2, 1, 1);
plot(time, data1);
title('Plot 1');
subplot(2, 1, 2);
plot(time, data2);
title('Plot 2');

dcm_obj = datacursormode(gcf);
set(dcm_obj, 'UpdateFcn',@callbackfcn);

function output_txt = callbackfcn(~, event_obj)
    
    pos = event_obj.Position;
    x = pos(1);
  
    % fetch y values from other subplot using child-parent relationship
    y1 = interp1(event_obj.Target.XData, event_obj.Target.YData, x);
    y2 = interp1(event_obj.Target.Parent.Parent.Children(1).Children.XData, event_obj.Target.Parent.Parent.Children(1).Children.YData, x);

    % display data as tooltip
    output_txt = {['X: ', num2str(x)], ['Y1: ', num2str(y1)], ['Y2: ', num2str(y2)]};
end

Result

Explore the following documentations for more details:

datacursormode - https://in.mathworks.com/help/matlab/ref/matlab.graphics.shape.internal.datacursormanager.html

Graphics Object Hierarchy-https://in.mathworks.com/help/matlab/creating_plots/graphics-objects.html

Regards

Vinayak Luha

[Dharmesh Joshi]

Hi Vinayak

Yes to a degree, but the data should not be displayed on the plot i am hover over, but on the original plot where the data is displayed. In simple terms i am trying to hover my mouse over multple plots at the same time, but in actual fact the mouse would be over only on of the plots.