ThingSpeak data tips Matlab Visualization Plot

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I want to create a ThingSpeak Matlab Visualization Plot with data tips (similar to the defaut ThingSpeak plot visualization).
When I enable this with after tge plot with:
dcm = datacursormode;
dcm.enable = "on";
I get data tips that say how long ago the plot was updated ("seconds ago").
So I tried to define an update function (from an example). But that did not help.
Seeing the Matlab code that generates the default ThingSpeak plot would likely answer my question...but I could not find it.
dcm.UpdateFcn = @displayCoordinates;
function txt = displayCoordinates(~, info)
txt = {sprintf('X: %.5f', info.Position(1)), sprintf('Y: %.5f', info.Position(2))};

Accepted Answer

Christopher Stapels
Christopher Stapels on 29 Mar 2021
Some of the features of ThingSpeak field plots are not available on custom visualizations.
Interactive plots from custom visualizations are not presently available.
You can create a custom visualization that provides the last update text on the plot itself at the time the plot was generated (not at mouse hover time)
It is possible to create interactive plots with ThingSpeak data in MATLAB Online or MATLAB desktop. Here is a video that shows how you can generate an IoT data explorer app in MATLAB.
  1 Comment
douglas freymann
douglas freymann on 22 May 2021
Is there a plan or timeline for allowing interactive plots (i.e. cursor moves to point, value pops up) for custom visualizations?
I've been banging on head on this for some time now, glad I found this answer so I can give up.

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