PolarAxis Minimum, Maximum

[Trude]

Is it possible to have a negative scale on PolarAxis? I have a dataset which ranges into the negatives, but those values get plotted to the center (zero). Setting Minimum/Maximum manually does not help.

[Martin Ivanov]

Hi Jorn,

Unfortunately, currently the PolarAxis doesn't support negative values. This is why if you set the value of the PolarAxis Minimum property to a negative value, the Minimum will be automatically set to zero. 

Regards,
Martin
Telerik

[Trude]

Is there a a way to access the labels and change them. As a workaround I was thinking about changing the all values to positive (for example adding 3 to all values if the scale goes from -3 to 3; so -3 is now zero, 0 is 3 etc.), plot them in the chart and then relabel the PolarAxis so that it appears to go from -3 to 3

[Martin Ivanov]

Hi Jorn,

The approach that you described is a possible workaround which you can implement by using the LabelTemplate property of the Axis and a ValueConverter to change the labels of the axis. Please also keep in mind that if you pass negative values to a PolarSeries this may lead to unclear visual representation of those values.

Regards,
Martin
Telerik

[Trude]

I implemented a workaround involving LabelTemplate and ValueConverter and it works as expected. I even threw in an annotation to mark origo. See attached screenshot.