#
12 Rose plots

class `rose_plot.T`
  Rose plot class is contributed by Kilian Hagemann. It's still experimental.

  Sample rose plot

  Below is the source code that produces the above chart. ../demos/roseplottest.py

      from pychart import *

      theme.use_color = 1

      data1 = [ 0.27027027,  0.74324324,  0.          ,
                0.34459459  ,0.47297297  ,0.06756757,
                0.90540541  ,1.          ,0.40540541  ,
                0.33783784  ,0.33783784  ,0.16216216]
      data2 = [ 0.93333333,  0.46666667  ,0.26666667  ,
                0.60666667  ,0.6         ,0.73333333,
                0.22666667,  0.72        ,0.13333333  ,
                0.46666667  ,1.          ,0.29333333]
      data = [('/7Model', data1), ('/7Station', data2)]

      ar = area.T(legend=legend.T(loc=(100,-5), right_fudge=0, left_fudge=3))

      plot = rose_plot.T(data=data, sector_centred=True)
      ar.add_plot(plot)
      ar.draw()

This class supports the following attributes:

`base_radius`
  Type: number Default: None.

`center`
  Type: (x,y) or None Default: None.

`data`
  Type: any Default: None.

  Specifies the data points. See Section 5

`data_col`
  Type: int Default: 1.

  The column, within "data", from which the data values are retrieved.

`dir_fill_style`
  Type: fill_style.T ( see Section 16) Default: fill_style.default.

`dir_line_style`
  Type: line_style.T ( see Section 14) Default: None.

`dir_offset`
  Type: length in points ( See Section 4) Default: None.

  The distance between the directions and the outermost circle. Defaults fine for most cases

`fill_styles`
  Type: list Default: ['fill_style.black', 'fill_style.gray70', 'fill_style.diag', 'fill_style.gray50', 'fill_style.white', 'fill_style.rdiag', 'fill_style.vert', 'fill_style.gray30', 'fill_style.gray20', 'fill_style.gray10', 'fill_style.diag2', 'fill_style.rdiag2', 'fill_style.diag3', 'fill_style.horiz', 'fill_style.gray90', 'fill_style.rdiag3', 'fill_style.wave', 'fill_style.vwave', 'fill_style.stitch', 'fill_style.lines', 'fill_style.diag_fine', 'fill_style.diag2_fine', 'fill_style.diag3_fine', 'fill_style.rdiag_fine', 'fill_style.rdiag2_fine', 'fill_style.rdiag3_fine', 'fill_style.horiz_fine', 'fill_style.vert_fine'].

  The fill style of each item. The length of the list should be equal to the length of the data.

`label_col`
  Type: int Default: 0.

  The column, within "data", from which the labels of items are retrieved.

`line_style`
  Type: line_style.T ( see Section 14) Default: linestyle: width=0.3, color=default, dash=None, cap=0, join=0.

`sector_centred`
  Type: int Default: 1.

  Bool indicating whether the sectors should be centred on each sector_width(e.g. on 0)

`sector_width`
  Type: int Default: None.

`shadow`
  Type: (xoff,yoff,fill) Default: None.

  The value is either None or a tuple. When non-None, a drop-shadow is drawn beneath the object. X-off, and y-off specifies the offset of the shadow relative to the object, and fill specifies the style of the shadow ( see Section 16).

`start_angle`
  Type: number Default: 90.