gsn_polygon

Draws a filled polygon on the given plot.

Prototype

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"

	procedure gsn_polygon (
		wks  [1] : graphic,  
		plot [1] : graphic,  
		x    [*] : numeric,  
		y    [*] : numeric,  
		res  [1] : logical   
	)

Arguments

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

A plot identifier created by using one of the many gsn functions, or by calling create to create a View object.

One-dimensional arrays of the same length containing the X and Y coordinates of the polygon, and must be in the range of the X/Y coordinates of the data in plot.

A variable containing an optional list of polygon 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.

Description

If a missing value is encountered in x and/or y, then this pair is ignored (the polygon will still be closed).

There are many fill patterns available, and you can use the gsFillIndex resource to change the fill pattern. The default is a solid fill. You can change the color of the fill via the gsFillColor resource.

If you want to resize the plot (i.e. by passing the plot to gsn_panel or setting the vpWidthF or vpHeightF resources), then use the function gsn_add_polygon which will cause the polygon to be automatically resized with the plot.

See Also

gsn_polygon, gsn_polymarker, gsn_polyline, gsn_polygon_ndc, gsn_polymarker_ndc, gsn_polyline_ndc, gsn_add_polygon, gsn_add_polymarker, gsn_add_polyline, gsn_text, gsn_text_ndc, gsn_add_text

Examples

For some application examples, see:

• "polyg_2.ncl" (view example)

Also, see the suite of polygon examples.