MATLAB: How to add additional info to the data cursor

data cursorplot

Hello
I'm wondering how I can get extra info (which is not plotted itself) to show on the data cursor of a plot.
Say I have multiple events, and three variables per event (nicely stashed in arrays), e.g. the time of the event, the position and some measured value. Say now that I plot this measured value against the position. Is there some way to also have the time of the event displayed in the data cursor per event?
Thanks in advance.
Lukas
(sorry for the self-bumping)

Best Answer

function test_main
% Plots graph and sets up a custom data tip update function
fig = figure('DeleteFcn','doc datacursormode');
X = 0:60;
t = (X)*0.02;
Y = sin(-16*t);
plot(X,Y)
dcm_obj = datacursormode(fig);
set(dcm_obj,'UpdateFcn',{@myupdatefcn,t})
function txt = myupdatefcn(~,event_obj,t)
% Customizes text of data tips
pos = get(event_obj,'Position');
I = get(event_obj, 'DataIndex');
txt = {['X: ',num2str(pos(1))],...
       ['Y: ',num2str(pos(2))],...
       ['I: ',num2str(I)],...
       ['T: ',num2str(t(I))]};
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