plot/point

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

scatter plot renderer.

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

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] :int)

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

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

explicit arrow segments.