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Bug introduced in 12.0 and persisting in 12.1.1

I want to change the plot markers of the data points in QuantilePlot. This seems pretty straightforward:

QuantilePlot[
                RandomVariate[NormalDistribution[0, 1], 32], NormalDistribution[mu, sigma],
                ReferenceLineStyle -> Directive[Red, Dashing[{Large}]], PlotMarkers -> {"\[EmptyCircle]"}
            ]

However we can see that we get a "Null" plot marker at either end of the reference line: enter image description here

Is there a specific command required in QuantilePlot to customise the plot markers for the data points?

| improve this question | |
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  • 1
    $\begingroup$ Please submit a bug report to Wolfram Tech Support $\endgroup$ – Bob Hanlon Oct 31 at 1:02
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It seems like a bug.

A work-around: Post-process to remove the unwanted Nulls:

{mu, sigma} = {1, 2};

SeedRandom[1]

qp = QuantilePlot[RandomVariate[NormalDistribution[0, 1], 32], 
 NormalDistribution[mu, sigma], 
 ReferenceLineStyle -> Directive[Red, Dashing[{Large}]], 
 PlotMarkers -> {"○"}];

qp/. Inset[Style[Null,___],___] -> {}

enter image description here

Note: The issue does not arise in Version 11.3.0.

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  • $\begingroup$ Thanks for the work around. $\endgroup$ – Q.P. Oct 30 at 23:28
  • $\begingroup$ Interesting that the problem isn't present in 11.3.0, I'm using 12.1.1.0. $\endgroup$ – Q.P. Oct 30 at 23:41

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