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Plot a black and white wind rose diagram where different line thicknesses are used to differentiate speed ranges.


load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"  ; This library is automatically loaded 
                                                          ; from NCL V6.2.0 onward.
                                                          ; No need for user to explicitly load.

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/wind_rose.ncl" ; Still need to load this library.

	function WindRoseThickLine (
		wks        : graphic,  
		wspd       : numeric,  
		wdir       : numeric,  
		numPetals  : integer,  
		circFr     : float,    
		spdBounds  : float,    
		res        : graphic   

	return_val  :  graphic



A Workstation identifier. The identifier is one returned either from calling gsn_open_wks or calling create to create a Workstation object.


A one-dimensional array of wind speeds (any units).


A one-dimensional array of wind directions (degrees). The wind directions are meteorological; that is, 90 degrees means blowing from the east.


Number of wind rose directions.


Intervals at which frequency circles are drawn.


Bounds for different colors.


A variable containing an optional list of plot resources, attached as attributes. Set to True if you want the attached attributes to be applied, and False if you either don't have any resources to set, or you don't want the resources applied. A common resource to set is the plot title tiMainString.

Return value

A plot identifier of the wind rose is returned.


This function creates a wind rose (i.e., a frequency of wind direction plus average speed). Speed ranges are differentiated via different line thicknesses.

See Also

WindRoseBasic, WindRoseColor


See: Example 2 of the wind rose examples.