How to add additional info to the data cursor?

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Lukas 2013-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/68079-how-to-add-additional-info-to-the-data-cursor

评论： akhila 2023-9-20

采纳的回答： ChristianW

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)

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ChristianW 2013-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/68079-how-to-add-additional-info-to-the-data-cursor#answer_79569

编辑：ChristianW 2013-3-26

在 MATLAB Online 中打开

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))]};