How do I extract custom data tip info

I have created custom data tips for my plot using the DataTipTemplate functionality. When I add cursors to a plot they display nicely all of the information that I want. Now I want to extract all of the data for the selected cursors to the workspace, but when I select "Extract Cursor Data to Workspace..." or use getCursorInfo() I only get the plotted position, not all of the extra information I put in the data tip. How can I extract the custom data to the workspace as well?

Answer 1

[Vinayak Gupta]

Hi David

The DataTipTemplate functionality is only able to modify that datatip display. It cannot modify the internal data, which is Target, Position and DataIndex. I am assuming you have some code similar to:

% Create a plot with custom data tips
x = 1:10;
y = rand(1,10);
p = plot(x, y);

% DataTipTemplate Method
dtt = p.DataTipTemplate;
dtt.DataTipRows(3).Label = 'Product';
dtt.DataTipRows(3).Value =  @(x,y)x*y;

We can create a workaround by writing a custom function:

function data = getCursor(dcm)
    data = getCursorInfo(dcm);
    for i=1:numel(data)
        data(i).Product = data(i).Position(1) .* data(i).Position(2);
    end
end

The function takes a datacursormanager object as the argument. Read more on DataCursorMode.

Also you can use data cursor to modify the datatips text

% DataCursor Update Method
dcm = datacursormode(gcf);
set(dcm,'UpdateFcn',@customTip);

function txt = customTip(obj,event_obj)
     pos = get(event_obj,'Position');
     txt = {...
         ['X: ', num2str(pos(1))], ...
         ['Y: ', num2str(pos(2))], ...
         ['Product: ', num2str(pos(1)*pos(2))] ...
         };
end

In any case, we will need to write our custom function to get customdata from the datatips.