I have the problem running the plot. I cannot plot the graph because of this code "invisible(" Is there a way we can call back the "invisible(def.on())". So that, I can run the plot.

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

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