[Gnuplot-info] function data extraction

[Stijn S. <sti...@ug...>]

Hi,

I would like to use gnuplot to plot functions implicitly contained in a large 
data table. However extracting the function tuple values, placing them in 
columns and specifying the gnuplot plot commands is proving to be very tedious 
work.

The table is made out of records containing various field. The same fields are 
in the same column. Kind of like in a database. Each column has a symbolic 
name. The table might then look something like:
                 x,  y,  f,  g,  u, s, t
record 1 |  1, 2, 3,  4,  5  0, 3
record 2 | ...
....

What I would like is a program or language in which I can state something 
like:

"plot  x : y : ( f + g * u ) (x,y) ", where f, g and u are functions of (x,y). 

The program should then be able to form the proper gnuplot commands to plot 
this.

Furthermore it would be nice if I could impose restrictions on the function 
domains like "plot ( f + g * u ) (x,y) WHERE s==0".

Does anyone know of any software that can do this?

Thanks for reading