Good catch! I thought this was a regression from #1188 but it looks like it always acted this way. I have two small questions:

• Do we need to demo this, such as with a cookbook recipe?
• Should the default for this property be true? It's a sensible default (otherwise why would the user provide category labels), but it is a breaking change
  • If the default changes to be dependent on whether IndependentAxes is set then we might need to allow the user to disable drawing category labels when IndependentAxes is enabled.

As a reminder, this is what we're discussing

double[,] values = {
    { 5, 3, 10, 15, 3, 2, 256 },
    { 5, 2, 10, 10, 1, 4, 252 },
};
var radar = plt.AddRadar(values, independentAxes: true);
radar.CategoryLabels = new string[] { "Wins", "Poles", "Podiums", "Points Finishes", "DNFs", "Fastest Laps", "Points" };
radar.GroupLabels = new[] { "Sebastian Vettel", "Fernando Alonso" };
radar.ShowCategoryLabels = true; // <-- this is what we are discussing
plt.Title("2010 Formula One World Championship");
plt.Legend();

ShowCategoryLabels = true	ShowCategoryLabels= false

Original Behavior / Issue this PR fixes

When I disable the independent axis feature, the labels go away while they can be seen when using independent axis

This seems like a good fix! Thanks @Rayffer

Do we need to demo this, such as with a cookbook recipe?

@bclehmann I imagine the majority of people will want to show the labels if they go through the effort of populating them, and this is probably easy enough to figure out that an explicit example isn't required.

Should the default for this property be true?

Is this variable actually necessary? What if we simplified the rule to "if category labels exist, show them". This property could be refactored to something like:

private bool ShowCategoryLabels => CategoryLabels is not null;

I'll go ahead and merge this now but if you think a change would make radar plots easier to use feel free to open-up a new PR to refine this behavior 👍

It's a sensible default ... but it is a breaking change

I'm pretty comfortable with small breaking changes if it makes the library less confusing for future users 😎