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I would like to plot some data in time and am trying to format it so that tooltips on mouse over gives the date and a value.

Something of the form 

    DateListPlot[Tooltip[data,
    StringForm["Time: ``, ``= ``", DateString[data[[x, 1]],{"Month","/", "Day", " ", "Hour", ":", "Minute"}],Title, data[[x, 2]]]]]

Is similar to what I want except I need data[[x,1]] or data[[x,2]] to have x as a reference to the current position DateListPlot is in the list so that mouse overs give correct time/value.

This example works when I just make x some number 1 <= x <= length(data).

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  • $\begingroup$ Look up MapIndexed, and pure functions using (# &). $\endgroup$
    – Sjoerd C. de Vries
    Commented Sep 8, 2014 at 5:40

1 Answer 1

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For illustrative purposes:

dt = DateRange[{2014, 1, 1}, {2014, 1, 31}];
v = RandomInteger[{5, 10}, 31];
dat = Transpose[{dt, v}];
tt = Tooltip[#, 
     Row[{DateString[
        First@#, {"DayNameShort", ", ", "Day", " ", "MonthNameShort", 
         " ", "Year"}], ": ", Style[Last@#, Red, Bold]}], 
     TooltipStyle -> {Background -> White, CellFrameColor -> Blue, 
       CellFrame -> 2}] & /@ dat;
DateListPlot[tt, PlotMarkers -> {Style[©, Red], 20}]

enter image description here

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  • $\begingroup$ i like the © Sign, it says see, see, see ... $\endgroup$
    – user9660
    Commented Sep 8, 2014 at 18:46
  • $\begingroup$ Can you apply this to multiple date lists of the form {dat1,dat2} $\endgroup$
    – Boris
    Commented May 9, 2019 at 16:21
  • $\begingroup$ @Boris if the 2 or more dat are prepared as tooltips it should work. You could write a generic function to prepare time series. Good luck :) $\endgroup$
    – ubpdqn
    Commented May 9, 2019 at 22:56
  • $\begingroup$ Yes, I tried 2 tt functions, but this is part of a larger project and I do need a generic as you suggest. Sadly this is beyond me - I tried, believe me. Can you suggest something? $\endgroup$
    – Boris
    Commented May 11, 2019 at 14:31
  • 1
    $\begingroup$ @Boris I would make the tooltip assignment a function then map it to your timeseries the DateListPlot. I $\endgroup$
    – ubpdqn
    Commented May 13, 2019 at 9:18

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