Synchronising data tip location on three plots

Hi all,

I have a GUI with three axes plots. When the user uses the data tip on one graph, I want it to appear on the other two, in the same place. When one is moved, I want the others to follow. How could I do this?

I am trying to set the position of a data tip on a graph programatically, but struggling.

fig = figure;
z = peaks;
plot(z(:,30:35))

dcm_obj = datacursormode(fig);
set(dcm_obj,'DisplayStyle','datatip',...
'SnapToDataVertex','off','Enable','on')

disp('Click line to display a data tip, then press Return.')
% Wait while the user does this.
pause

c_info = getCursorInfo(dcm_obj);
% Make selected point move
c_info.Position = [2,2] % set position

How would I set the data cursors position?

Is there a better way to make data tips appear on the other two plots in my GUI, and synchronise their location?

I have found linkprop function but not sure how to use it to be honest.

Thanks,

Matt

[Matt]

Hi, Does anyone have any more thoughts on this? I am struggling to implement this! Thanks in advance, Matt.

[Matt]

I have found this but I am unsure where to begin to adapt it for my GUI.

I would like the crosshairs and x and y coordinates though...

http://uk.mathworks.com/matlabcentral/fileexchange/1038-plot-crosshairs

I have also found this, and it works very well, but you cannot drag the data tips with the mouse, and there is not a vertical crosshair that would span my three subplots

http://uk.mathworks.com/matlabcentral/answers/1308-cursor-line

Answer 1

[Walter Roberson]

It is possible to move the cursor... but I have not figured out how to control where it goes.

dcm_obj = datacursormode(fig);

then

here = dcm_obj.CurrentCursor.Position

dcm_obj.CurrentCursor.moveTo([-10,200])

there = dcm_obj.CurrentCursor.Position

I have not figured out how the argument such as [-10,200] relates to where the cursor ends up. It does seem repeatable, but I have not figured out the coordinate system.

[Matt]

Thanks, that works. I thought it placed the cursor at the nearest data point but it doesn't seem to - odd.

fig = figure;
z = peaks;
plot(z(:,30:35))

dcm_obj = datacursormode(fig)

disp('Place the data cursor on graph and press enter')
pause

here = dcm_obj.CurrentCursor.Position

dcm_obj.CurrentCursor.moveTo([10,-3.7])

there = dcm_obj.CurrentCursor.Position

So... now, how can we link the position of three data tip cursors?

[Walter Roberson]

When I used moveTo the destinations did not seem to have all that much relationship to the coordinates passed.

Perhaps you could set their UpdateFcn to move the other cursors with moveTo ?

You might also need to use dcm_obj.updateDataCursors() after

There might be a race condition -- if the moveTo triggers the update function then you don't want the other cursor's update to trigger you again...

Answer 2

[ali amini]

I think this function does the job :

https://www.mathworks.com/matlabcentral/fileexchange/78405-linkcursors