datatip for timeseries plot with date string

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ThorBarra 2011-10-17

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I have a time series where the date is given by a date string. I'd like to use the data tip to find specific events on the plot. How would I have to modify the text update function so that the x-axis is given as readable date? Or what format has the x-axis when a timesieries is plotted with absolute dates in the time.

thanks.t.

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Answer 1

Titus Edelhofer 2011-10-17

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Hi,

I guess by "absolute dates" you mean something like

ts = timeseries(rand(12,1), datenum(2011, 1:12, 1));
plot(ts);
datetick('x', 'mm/yyyy')

If this is the case:

dcm = datacursormode(gcf);
dcm.Enable = 'on';
dcm.UpdateFcn = @myupdate;

and save the following code to myupdate.m:

function txt = myupdate(src, event)
pos = get(event,'Position');
txt = {['Date: ' datestr(pos(1), 'dd.mm.yyyy')], ...
    ['Value: ' num2str(pos(2))]};