Actually, this only happens in the browser test view.

When I run the app on the Appery.io tester app, it's fine...

Ok, this does reset the axis labels, however it also seems to have an additional side effect of adding extra lines:

I also tried this:

Appery('html_4').html("");

but the effect was the same...

Maybe there is a simple way of clearing the html object?

Here you can see the axis labels are messy:

Not sure if this is the most efficient method, but it works just fine.

And plot away:

Once this is complete. Setup the jqplot arrays:

Second step was to keep adding the results to local storage variables as each value arrives: