Labels in polar charts

[ColinG]

I am trying to display custom labels around the circle of a polar chart, to replace the default degree labels. But I can't see how to do this - can you help? I suspect I am missing something obvious!

In a Windrose chart, it displays 8 direction labels (N, NE, E etc) correctly, but I cannot get it to display 16 (N, NNE, NE etc) because I cannot set the Angle Increment to 22.5 (it insists on being an integer). Is there a way round this?

Colin

[Pep]

Hi Colin,

which teeChart version are you using ? Using the latest TeeChart Pro v7 you can do :
TChart1.Series(0).asWindRose.AngleIncrement = 22.5

[ColinG]

Thanks for the reply. You are right that it works in the code, but it does not work in the Editor, which converts the angle value to an integer. A minor point - setting the angle to 22.5 in code is fine except that the directions NNE, ENE etc are not displayed. Should they be?

However, my main question was how to set up custom labels around the circle of a polar-type chart. The circle doesn't seem to correspond to any of the axes, so I cannot use OnGetAxisLabel to modify the labels. Is there another way? the reason I need this is to produce a polar chart for value other than angles (for example hours in a day, or months in a year).

[Pep]

Hi Colin,

Thanks for the reply. You are right that it works in the code, but it does not work in the Editor, which converts the angle value to an integer.

Yes, you're correct, in the editor only integer values are accepted, I've added this on our wish list to be modified for future releases.

A minor point - setting the angle to 22.5 in code is fine except that the directions NNE, ENE etc are not displayed. Should they be?

to see all the circle labels you could assign the angleIncrement to 15 :
TChart1.Series(0).asWindRose.AngleIncrement = 15

However, my main question was how to set up custom labels around the circle of a polar-type chart. The circle doesn't seem to correspond to any of the axes, so I cannot use OnGetAxisLabel to modify the labels. Is there another way? the reason I need this is to produce a polar chart for value other than angles (for example hours in a day, or months in a year).

There's not a way to customize the circle labels, it's on our wish list to be considered for further releases. For the moment this only can be done witht he TeeChart Pro (Source Code version), only the VCL, NET and Java versions can be obtained with source code.

[Minas]

Hi,

have you fixed the editor so i can have decimal values for angle increment at windrose in TeeChart 8 ?

Thanks

Minas

[Pep]

Hi Minas,

yes, it has been fixed for the next TeeChart Pro v8.