plot/point

(points [vs : int style : int label : cstr] :)

scatter plot renderer.

(error-bars [bars : int style : int invert : int label : cstr] :)

vertical or horizontal error bars.

(vector-field [f x-min : float x-max : float y-min : float y-max : float samples : int scale-mode : int style : int label : cstr] :)

sample f(x,y)->(cons dx dy) over a grid.

(arrows [arrow-list : int style : int label : cstr] :)

explicit arrow segments.