Scatter plot examples

                     HEIGHT vs WEIGHT of 252 MEN
       |                    +
 W  250+                                       +
 e     |                               +           +     +
 i     |                       +        +++ +     ++
 g     | +                +    +++++ +   ++   + + +++    +      +
 h     |                     +  +2   +++ +  ++ +   +++
 t  200+             +    ++   +2+  ++ ++2 2 ++4+ 2
       |     +  ++        +   +++ +2+  ++ 2 + 2  3 +   +       +
 -     |        +    + ++2+23 +2+3+  2+32+22++  ++ +
 l     |       +     + 3+++3  34++ 2+ 34+++ ++    +   +
 b     |        ++ 2+ 32+ + +232+ 3 2 +2  2 + + +
 s  150+        + + ++224   ++4 +2 ++ ++  2    +
 -     |        +     ++++++++     +       +
       | +  +  ++   2+ 2 +
       |                 +
         ----+---------+---------+---------+---------+---------+-- 
          65.0      67.5      70.0      72.5      75.0      77.5
                                Height (inches)
Source: http://lib.stat.cmu.edu/datasets/bodyfat

          Time to invert a random NxN matrix 20 times using
          APLW on an Intel 486DX2 with math coprocessor.
     30+ 
       -                                                     x
       -                                              2      x
T      -
i      -
m    20+
e      -
       -
i      -                                        2
n      -
     10+
s      -                                 2
e      -                          x
c      -                          x
       -             2      2
      0+      2
         --+---------+---------+---------+---------+---------+---- 
    N =   15        30        45        60        75        90

Source: William Knight, Univ of New Brunswick, Canada


               CHLORESTAL LEVELS OF 28 HEART ATTACK PATIENTS       
       |                                                         +
       |
 4  320+
       |
 d     |                            +         +
 a     |                            +      +   +
 y     |                                     + +       +
 s  240+                   +    + 2       +      +
       |                          +        +++
 a     |                    +  +             +       +
 f     |              +                       +
 t     |                      +
 e  160+
 r     |       +
       |
       |   +
       |
         ------+---------+---------+---------+---------+---------+
             160       200       240       280       320       360
                         2 days after heart attack

 Source: Data file "cholest.mtw" supplied with Minitab™


                 WATERSHED AREA vs SURFACE AREA of LAKES
   Information on the lakes in Vilas and Oneida Counties, Wisconson
S      -
u  3600+       x
r      -
f      -
a      -
c      -
e  2400+
       -
i      -
n      -
       -            x         x
A  1200+                                                   x
c      -     x
r      -   x  x
e      -  32     x
s      - 3#4xxx  2                                x             x
      0+ ##
         +---------+---------+---------+---------+---------+------ 
         0        16        32        48        64        80
                        Watershed in Square Miles
Note:   "#" indicates more than 9 observations at that point.
Source: File "lakes.mtw" supplied with Minitab™