Wind Rose / Energy Rose

This file creates a wind rose of input data (e.g. wind direction and wind speed)

The purpose of this submission is to provide a simple to use wind rose generator which bins the data for you. It is also possible to create an energy rose.
Syntax:
WindRoseData = WindRose(AxisHandle, WindDirectionData, Data, ...
WindDirectionBins, WindSpeedBins, CirclePositions, ...
Title, varargin)

Example:
WindRoseData = WindRose(gca, 360 * rand(1000, 1), 40 * rand(1000, 1), ...
0 : 30 : 330, 2.5 : 5 : 37.5, [5 10 15 20], ...
'My first wind rose!');

The basic idea came from this submission: http://www.mathworks.com/matlabcentral/fileexchange/17748-wind-rose. The best results are procuded using a recent MATLAB version, because of the new anti-aliasing for plots.