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Groups > comp.graphics.apps.gnuplot > #2420 > unrolled thread

using xrange in a time format context

Started byJean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr>
First post2014-04-23 13:57 +0200
Last post2014-04-24 10:22 +0200
Articles 3 — 3 participants

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  using xrange in a time format context Jean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr> - 2014-04-23 13:57 +0200
    Re: using xrange in a time format context Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2014-04-23 20:23 +0200
    Re: using xrange in a time format context Karl <mail.kfr@gmx.net> - 2014-04-24 10:22 +0200

#2420 — using xrange in a time format context

FromJean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr>
Date2014-04-23 13:57 +0200
Subjectusing xrange in a time format context
Message-ID<alpine.WNT.2.10.1404231352050.3548@BecaneCoulon>
My input data file looks like:

1081231399.000000  1.56 
1081232399.000000  1.57
....... 600 lines ....
1081830399.000000  1.55

I succedeed in plotting it with time formats saying:
set xdata time
set timefmt "%S"
set format x "%d-%m\n%H:%M"
plot "mystuff.txt" using ($1-1072483215.):2 with lines

Now the problem is choosing an xrange: saying "set xrange 
[1081231399:1081241399]" or set xrange ["13-04 00:00" : "14-04 00:00"] 
causes "all points y value are undefined!"

Should xrange speak the language of the x column of the input file or that 
of the time-converted x values?

Jean-Pierre Coulon

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#2421

FromHans-Bernhard Bröker <HBBroeker@t-online.de>
Date2014-04-23 20:23 +0200
Message-ID<brqep9F995vU1@mid.dfncis.de>
In reply to#2420
On 23.04.2014 13:57, Jean-Pierre Coulon wrote:
> Should xrange speak the language of the x column of the input file or
> that of the time-converted x values?

The x range is that of the actual values as used.  It doesn't matter 
what's in the file --- there might not even be a file.

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#2422

FromKarl <mail.kfr@gmx.net>
Date2014-04-24 10:22 +0200
Message-ID<ljahlf$g19$1@news.rz.uni-karlsruhe.de>
In reply to#2420
Am 23.04.2014 13:57, schrieb Jean-Pierre Coulon:
> My input data file looks like:
> 
> 1081231399.000000  1.56 1081232399.000000  1.57
> ........ 600 lines ....
> 1081830399.000000  1.55
> 
> I succedeed in plotting it with time formats saying:
> set xdata time
> set timefmt "%S"
> set format x "%d-%m\n%H:%M"
> plot "mystuff.txt" using ($1-1072483215.):2 with lines
> 
> Now the problem is choosing an xrange: saying "set xrange
> [1081231399:1081241399]" or set xrange ["13-04 00:00" : "14-04 00:00"]
> causes "all points y value are undefined!"
> 
> Should xrange speak the language of the x column of the input file or
> that of the time-converted x values?
> 

Neither, the xrange is applied to what comes out of the "using" statement.

The timeformat is just for the axis labels.

 K

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