[Gnuplot-info] time format

[Dieter F. <Die...@be...>]

I have a data-file with lines like these:

#nr,date,time,ele
1,2005-06-18,08:59:49,757
2,2005-06-18,08:59:59,758
3,2005-06-18,09:00:06,757
4,2005-06-18,09:00:08,757
5,2005-06-18,09:00:14,758

In gnuplot (4.0) I set this:

set datafile separator ","
set xdata time
set timefmt "%Y-%m-%d,%H:%M:%S"
set format x "%H:%M"
plot "file.dat" using 2:4

which works well.

But can anyone tell me, what I have to do/set, to see the time +2
hours?
Because the date in the file ist UTC and I want to see it in MET?

I tried "plot "file.dat" using (($2)+2):4 but this doesn't work as I
hoped. It shows this:
Warning: empty x range [2007:2007], adjusting to [1986.93:2027.07]


Thanks in advance.

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