Re: [Gnuplot-info] growth rate

[Hans-Bernhard B. <br...@ph...>]

Even Karl wrote:
> I am very embarassed with growth rate calculation with gnuplot.

I can only assume that your use of "embarassed" in this context is a 
language issue.  As is, that statement doesn't really make any sense.

> Is it possible to be returned graphically something like xt/xt-1 (x beeing a
> statistical series) under gnuplot?

"Under" gnuplot: yes.  But not in gnuplot itself.  Gnuplot doesn't do 
on-the-fly modifications of data involving more than text line's worth 
of them (i.e. one "record", see "help glossary").

For modifications like this, use external data processing tools.  E.g.
'awk'.  You can even do that under gnuplot's control, if you're on the 
right kind of platform:

   plot '<awk "{print $1 \"\\t\" $2/xt_m_1; xt_m_1 = $2}" data'

(or something roughly like that).  For better result, write an awk 
script and run it by

	plot '<yourscript data'