`val stack : ?radius:Num.t -> ?color:Color.t list -> ?pen:Pen.t -> ?style:Dash.t list -> ?ticks:float -> ?label:string list -> ?scale:float list -> float list list -> Picture.t`

`stack l` builds a picture from a list `l` of floating-point lists. The radars are all drawn on the same picture. Each sublist represents one radar datas. All sublists must have the same length.

- parameter radius

  The radius of the whole picture

- parameter pen

  The pen used to draw the radars

- parameter color

  The colors used to draw each radar; it is used circularly

- parameter style

  The dash-styles used to draw each radar; it is used circularly

- parameter ticks

  The interval between each ticks along the axes (relative to the values)

- parameter scale

  The size of every axe, relative to the values; when not specified, the maximal value along each axe is chosen

`val compare : ?radius:Num.t -> ?color:Color.t list -> ?fill:bool -> ?pen:Pen.t -> ?style:Dash.t list -> ?ticks:float -> ?label:string list -> ?scale:float list -> float list list -> Picture.t list`

`stack l` builds a list of pictures from a list `l` of floating-point lists. Each picture represents one radar, and all picture have the same size. Each sublist represents one radar datas, and all sublists must have the same length. For most optional arguments, see function `stack` above.

- parameter fill

  Fill the radar with its color.