[Gnuplot-info] Plot from data file: read multiple rows at the same time

[Marco C. <mar...@gm...>]

Hi list,
   i'm using gnuplot to plot data from a data file, made by different blocks.
I have to plot, however, some data that request the use of data from
multiple rows, and in particular from the row before the active one:

in particular something like this
#   energy   function
     1                10
     2                20
     3                30
     ..    ..

i would like to plot on the y axis of the graph
"function/(energy-(energy-1))" where energy-1 is the  "energy" column
before the active one. For example for the table above that would be
30/(3-2).
Is this possible with gnuplot?

Thanks in advance,
mc