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Full Discussion: Problem creating graph with gnuplot with time on x-axis
Top Forums Shell Programming and Scripting Problem creating graph with gnuplot with time on x-axis Post 302789911 by hakro807 on Thursday 4th of April 2013 12:09:02 PM
Old 04-04-2013
I just realised the code I posted was incomplete. Since the x axis is time gnuplot has to be told so.

So the final code looks like this:

Code:
gnuplot
set terminal png
set output "graph_realtime.png"
set yrange [10:50]
set timefmt "%H:%M"
plot "./values_minute" using 1:2 title 'Temperature' with lines, \
"./values_minute" using 1:3 title 'Humidity' with lines

This works without giving an error message, but all the values is located at the extreme ends of the graph.

Added
Code:
set xdata time

which helped. But now I need to make the x axis easily readable, maybe tics every 15 minutes.

Added
Code:
set xtics "14:00", 900, "16:00"

which help but it's still showing the time as hours:minutes:seconds, how to only show it as hours:minutes? And does it exist an easy way to replace (in my example) 14:00 and 16:00 with proper values, i.e. if it was measured from 09:05 to 10:04 the first tic (excluding the edges of the graph) would be at 09:15, the last at at 10:00? I guess it's similar to
Code:
 set xtics "%H:M", 900, "%H:%M"

or do I have to create a script that read the first and last value from the table with values and insert the correct time?
Last edited by hakro807; 04-04-2013 at 01:50 PM..
 

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LEARN ABOUT DEBIAN

xpl2gpl

XPL2GPL(1)						      General Commands Manual							XPL2GPL(1)

NAME

       xpl2gpl - Convert tcptrace-style xplot input to gnuplot input.

SYNOPSIS

       xpl2gpl [-s] <file_name>

DESCRIPTION

       xpl2gpl	is a utility that converters tcptrace-style xplot input to gnuplot input.  This converter gives a nearly perfect gnuplot reproduc-
       tion of the corresponding xplot graph.

OPTIONS

       -s     Seperate files.  If you wish to plot only some data from the xpl file, you may use the -s option, which generates a bunch  of  data-
	      files filtered based on the color and plotting style.

EXAMPLES

       xpl2gpl foo.xpl

       This  would  produce files by the names "foo.gpl", "foo.datasets" and "foo.labels".  Load the file "file_name.gpl" in gnuplot and it should
       give you the plot.

NOTES

       xpl2gpl is provided for convenience, as gnuplot is more commonly installed than the xplot package  that	tcptrace  typically  expects,  and
       because xplot has not always been available in Debian. If possible, you should consider installing the xplot-xplot.org package and using it
       instead of using xpl2gpl.

AUTHOR

       Avinash Lakhiani (no known email address)

       This manual page was written by Noah Meyerhans <noahm@debian.org> for the Debian project and may be used freely and without restriction	by
       others.

SEE ALSO

       tcptrace(1)

								    Aug 8, 2009 							XPL2GPL(1)
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