[Gnuplot-info] how to set xtics using character strings saved in a file

[Jon <dev...@gm...>]

Hello,

Suppose I have the following data file, aaa.txt,

1  A   0.1
2  B   0.5
3  C  0.23
4  D  0.4
5  E  0.32
6  F  0.9

and I want to use the second column to display at each xtics and replace the
numbers, so that I get

|
|     graph displayed here
-----------------------------------------------
 A   B   C   D   E   F  ...

Or even further

|
|    graph displayed here
---------------------------------------------
  1    2    3    4    5    . ....
 A   B    C    E    F    ....

Is there way to realize these effects?

Thanks!

Sincerely,
Jon