Cursor function when studying .mat figures.

Function/myupdatefcn.m

+function txt = myupdatefcn(~, event_obj, positions, velocities)
+    % Customizes text of data tips
+    pos = get(event_obj,'Position');  % Get the position of the data tip
+    idx = find(ismember(positions, pos, 'rows'));  % Find the index of the position in the matrix
+
+    if isempty(idx)
+        txt = {'Position:', pos, 'Velocity: Not found'};
+    else
+        vel = velocities(idx, :);  % Extract corresponding velocity
+        vel_mag = norm(vel);  % Calculate the magnitude of the velocity vector
+        txt = {['Position: (', num2str(pos(1)), ', ', num2str(pos(2)), ', ', num2str(pos(3)), ')'], ...
+               ['Velocity: (', num2str(vel(1)), ', ', num2str(vel(2)), ', ', num2str(vel(3)), ')'], ...
+               ['Velocity Magnitude: ', num2str(vel_mag), ' m/s']};  % Add magnitude to the data tip
+    end
+end
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