Add graph : scatter plot graph.

[4surix]

Description

Add the scatter plot :

   6 │           •
     │                 •
   4 │        ●
     │     •
   2 │  •
     │
     └────────────────────
   0    2   4   6   8   10

The graph will be divided into several areas for technical reasons.

   6 │  |  |  |  |  | •|
     │--------------------
     │  |  |  |  |  |  |
     │--------------------
   4 │  |  |  |  |● |  |
     │--------------------
     │  |  | •|  |  |  |
     │--------------------
   2 │  |• |  |  |  |  |
     │--------------------
     │AB|  |  |  |  |  |
     └────────────────────
   0     2     4     6   

A is an area. B is an area.

Use the characters :

• • for a single point in the area.
  For example, if there is a single point between 0.5 and 1 on the x-axis, and between 0 and 1 on the y-axis, in the area B.
• ● for multiple values in the area.
  For example, if there are several points between 0 and 0.5 on the x-axis, and between 0 and 1 on the y-axis, in the area A.