plsvect: Set arrow style for vector plots

plsvect (arrowx, arrowy, npts, fill);

Set the style for the arrow used by plvect to plot vectors.

arrowx, arrowy (PLFLT *,input)

Pointers to a pair of arrays containing the x and y points which make up the arrow. The arrow is plotted by joining these points to form a polygon. The scaling assumes that the x and y points in the arrow lie in the range -0.5 <= x,y <= 0.5.

npts (PLINT,input)

Number of points in the arrays arrowx and arrowy.

fill (PLINT,input)

If fill = 0 then the arrow is open, if fill = 1 then the arrow is filled.