default_getDatatipText.m MATLAB R2014+

I'd like to change the default data tip that's displayed on plots in MATLAB R2014+ versions. Before, one could edit the file default_getDatatipText.m and change the number of digits. Now that file no longer exists.

I'd like to change the default behavior instead of changing the datacursor mode to a custom update function.

e.g. I could do something like this: dcm = datacursormode; set(dcm, 'UpdateFcn', @tenDigitTextUpdate)

But I'd rather change the default instead.

Answer 1

[Joe Vinciguerra]

(courtesy of stackoverflow)

add the following to your startup.m file:

set(0,'defaultFigureCreateFcn',@(s,e)datacursorextra(s))

Create a new M-file in your matlab path called "datacursorextra.m" and insert the following into that file:

function datacursorextra(fig)
    % Use current figure as default
    if nargin<1
        fig = gcf;
    end

    % Get the figure's datacursormode, and set the update function
    h = datacursormode(fig);
    set(h,'UpdateFcn',@myupdatefcn)

    % The actual update function
    function txt = myupdatefcn(~,event)
        % Short-hand to write X, Y and if available Z, with 10 digit precision:
        lbl = 'XYZ';
        txt = arrayfun(@(s,g)sprintf('%s: %.10g',s,g), lbl(1:length(event.Position)), event.Position,'uniformoutput',false);

        % If a DataIndex is available, show that also:
        info = getCursorInfo(h);
        if isfield(info,'DataIndex')
            DataIndex = [info.DataIndex];
            txt{end+1} = sprintf('Index: %d\n', DataIndex(1));
        end
    end
end

Change the formatting in line 15 to your liking.

[Hannes]

This works well and I have been using the startup.m file to customize default settings.

However, this seems to crash the App Designer! (2019b and 2020a)