Re: [Gnuplot-info] Storing point from data file in variable

[Jeremy C. <jer...@gm...>]

On Thu, Jun 4, 2009 at 5:06 AM, Thomas Sefzick <t.s...@fz...>wrote:

>
> get 1st data of column 3:
>
> x1 = system("head -n1 datafilename | cut -d ' ' -f 3")
> or
> x1 = system("head -n1 ts.dat | awk '{print $3}'")
>
> or with gnuplot 4.3-cvs:
>
> set table
> plot 'datafilename' us 0:($0==0?(x1=$3):$3)
> unset table
>
I do have gnuplot 4.3 and that command sets x1 to the value I want.  But
it's rather cryptic.  Can you tell me what everything means or point me
toward the documentation explaining it?

Thanks,
Jeremy