REFVEC

     REFVEC specifies the size and location on the screen of the
     reference arrow using the following format:

		Magnitude; x; y; text size/font/width/HW; string
 
     Magnitude refers to the size of the reference wind arrow 
     to be plotted.  For example, using 10.0 results in a 
     reference arrow of 10.0 units being plotted.   

     If the magnitude specified is 0, no reference arrow is plotted.
     The default is 0.

     The user specifies the location of the reference arrow by
     entering values between 0.0 and 1.0 for x-location and y-     
     location.  These values are normalized to the display so, for 
     example, the center of the display is  0.5;0.5.  If no values
     are entered, the reference arrow is plotted in the lower left
     hand corner:  0.05;0.05.

     The text attributes: size, font, width and HW flag; are 
     applied only to the text displayed with the reference vector.
     See the TEXT help for further details on these attributes.

     The string specifies the label for the reference vector.  This 
     text may contain any keyboard character.  If the string is
     empty, an appropriate label will be generated.