Mlpost.Real_plot
A simple and limited way of plotting functions from float to float.
'a store the information about :
val curve : (float -> float) -> 'a -> 'a curve
create a curve from a function and some information of drawing
val curve_opt : (float -> float option) -> 'a -> 'a curve
create a curve from a function and some information of drawing. If the function return None the function is not defined on this value
val curve_l : (float -> float option) list -> 'a -> 'a curve
create a curve from multiple function and some information of drawing. The different functions symbolize different part of the curve which mustn't be connected