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graph of complex data and timfmt settings

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Dear gnuplot's guru

I'm quite new with gnuplot, and my main trouble arises from a complex
format of  data.

I'd like to plot data coming daily from a set of digital sensors when
they are stored on disk.

This is the format of the log:  Data - time - level1 - level2

where "level*" are the most relevant data:

Wed Jun  1 03:00:01 2011 : level1 =  54 %, level2 = -3159.0
Thu Jun  2 03:00:02 2011 : level1 =  53 %, level2 = -3159.0
Fri Jun  3 03:00:03 2011 : level1 =  53 %, level2 = -3159.0
Sat Jun  4 03:00:02 2011 : level1=  52 %, level2 = -3159.0
Sun Jun  5 03:00:03 2011 : level1 =  51 %, level2 = -3159.0
Mon Jun  6 03:00:03 2011 : level1 =  49 %, level2 = -3159.0
Tue Jun  7 03:00:03 2011 : level1 =  48 %, level2 = -3165.0
Wed Jun  8 03:00:02 2011 : level1 = 48 %, level2 = -3149.0
Thu Jun  9 03:00:03 2011 : level1 = 47 %, level2 = -3174.0
Fri Jun 10 03:00:01 2011 : level1 = 47 %, level2 = -3173.0
Sat Jun 11 03:00:02 2011 : level1 = 45 %, level2 = -3173.0

I have tried with the following set timefmt command, but it did not
work:

set timefmt "%a %b %d %T %Y"

The ideal would be to have on X-axis the data (the time is not
relevant) and both "levels" on Y-axis with their own scale.

Each plot should graph one week or one month of data.

Could you give to me some help?

Many thanks
ZPP

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graph of complex data and timfmt settings Zio Peppe <zipeppe@gmail.com> - 2011-06-13 22:44 -0700
  Re: graph of complex data and timfmt settings Péter Juhász <peter.juhasz83@gmail.com> - 2011-06-14 02:14 -0700

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