ThingSpeak data tips Matlab Visualization Plot

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Michael Gacsaly
Michael Gacsaly 2021-3-27
评论： Christopher Stapels 2025-1-24
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))};
end

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采纳的回答

Christopher Stapels
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.
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Konstantin
Konstantin 2025-1-20
Without intercativity these custom visualization charts are pretty much useless...
Christopher Stapels
Christopher Stapels 2025-1-24
Consider using MATLAB online for fully interactive plots. I think you can share a lot of important data without interactive plots. Using text labels or creative scaling, or multiple tiled plots, you can still share the information you are trying to share with the consumers of your plots.

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