[Gnuplot-info] plot dstat output cvs file

[Bart V. <Bar...@te...>]

I'm trying to plot an output file from dstat obtained with

   dstat -tv --output dstat_timed.csv

the data-file looks as follows:

-----------------------------------------------------------------------------
"Dstat 0.7.2 CSV output"
"Author:","Dag Wieers 
<da...@wi...>",,,,"URL:","http://dag.wieers.com/home-made/dstat/"
"Host:","maverick",,,,"User:","mc303"
"Cmdline:","dstat -tv --output dstat_timed.csv",,,,"Date:","30 Oct 2013 
11:19:41 CET"

"system","procs",,,"memory 
usage",,,,"paging",,"dsk/total",,"system",,"total cpu usage",,,,,
"time","run","blk","new","used","buff","cach","free","in","out","read","writ","int","csw","usr","sys","idl","wai","hiq","siq"
30-10 
11:19:41,0.000,0.0,1.284,729153536.0,416268288.0,1697247232.0,1353175040.0,0.0,0.0,230338.748,250793.406,1390.199,2597.766,12.913,5.164,74.172,7.655,0.005,0.092
30-10 
11:19:42,0.0,0.0,0.0,729186304.0,416268288.0,1697263616.0,1353125888.0,0.0,0.0,0.0,0.0,955.0,1634.0,3.535,4.040,92.424,0.0,0.0,0.0
30-10 
11:19:43,0.0,0.0,1.0,729186304.0,416268288.0,1697263616.0,1353125888.0,0.0,0.0,0.0,0.0,1104.0,2043.0,5.612,4.082,89.796,0.0,0.0,0.510
30-10 
11:19:44,0.0,0.0,1.0,729194496.0,416268288.0,1697263616.0,1353117696.0,0.0,0.0,0.0,0.0,1071.0,1841.0,6.186,3.093,90.722,0.0,0.0,0.0
30-10 
11:19:45,0.0,0.0,17.0,730214400.0,416268288.0,1697263616.0,1352097792.0,0.0,0.0,0.0,4096.0,1313.0,2408.0,7.143,3.571,89.286,0.0,0.0,0.0
-----------------------------------------------------------------------------

I'm trying to plot with the following script:

---------------------------------------------------
set datafile separator ","

set xlabel "Time"
set xdata time
set timefmt "%d-%m %H:%M:%S"
set format x "%H:%M"

set title "procs"
plot "dstat_timed.csv" u 1:2 t columnheader(2) w lp, \
      "" using 1:3 t columnheader(3) w lp, \
      "" using 1:4 t columnheader(4) w lp
---------------------------------------------------

but unfortunately, this only works if I uncomment the first 6 lines in 
the data-file.

I already tried plotting with

   plot "dstat_timed.csv" u 1:2 every ::6 t columnheader(2) w lp

but this didn't help.

How can I tell gnuplot to ignore the first 6 lines in the data-file?

Thanks for your help,
Bart