PolarPlot

PolarPlot is one of Pablo's display functional units.  It accepts as input
a two-dimensional array of data values and plots the data as points in
polar coordinate form.  


Functional Unit Inputs:  array

PolarPlot attributs:

	XtNheight	height (in pixels) of the piechart widget
	XtNwidth	width (in pixels) of the piechart widget
	XtNbackground   color of the background of the widget drawing area
	XtNaxisColor	color of the lines used to draw the polar axes
	XtNcircleColor	color of the lines used to draw the concentric circles
			     in the drawing area
	XtNpointColor	color of the points plotted
	XtNnumCircles	number of concentric circles to draw within the 
	  		     plotting area
	XtNnumAxes	number of polar axes to draw within the plotting area
	XtNnumColors	number of default colors used in the plot
	XtNmagnitude	maximum polar magnitude value represented in the
			     drawing area
	XtNmarkerSize	the radius of point markers drawn when selected by
			     a mouse click 
