Date: Thu, 2 Jan 2020 15:29:14 +0100 From: Polytropon <freebsd@edvax.de> To: thor <thor@irk.ru> Cc: freebsd-questions@freebsd.org Subject: Re: Src of any simple data plotting graphic program under X-Windows needed Message-ID: <20200102152914.e98bb8ee.freebsd@edvax.de> In-Reply-To: <9e461c4b-bd0e-8c3e-5b78-77d59afcc6a5@irk.ru> References: <9e461c4b-bd0e-8c3e-5b78-77d59afcc6a5@irk.ru>
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On Thu, 2 Jan 2020 22:00:49 +0800, thor wrote: > I need some specialized program that should just read a data file and > plot it in X-windows. No dependencies, no toolkits - just an absolutely > bare minimum. I just have neither a disk space on target system for any > specialized toolkits nor time to study them. I'd suggest GNUplot. It can process "linear" data as well as CSV files, and write to the X display or to an image file (or EPS). > Long time ago (some 20 years or so) in FreeBSD 3 times I used a > primitive program named xperfmon3 that plotted the current processor use > etc but it expired due to absence of a maintainer and I cannot find it. Yes, I remember that program. In case you want to plot system usage data, check out xload, xmbmon, xcpufreq. > Are there in port tree any similar simple programs that could be used as > a prototype? If your data is simple, and your displaying requirements are simple, you can probably write your own solution using toools like Perl or Python, where there are plenty of libraries and examples for data plotting. In case you don't want to deal with that, consider testing gnuplot, even though it's not exactly "lightweight" in terms of dependencies... For example, if this is your data: 1 12.5 2 13.5 3 14.8 4 14.2 5 13.2 6 14.0 7 14.9 8 13.6 9 14.9 10 15.8 11 13.3 12 13.7 You can use the following gnuplot control file to plot them: set title '2008 (12.9)' set size 3.0, 1.0 set xr [1:12] set yr [0.0:25.0] set border set grid set xtics 1, 1 set ytics 0, 5 plot '2008.dat' using 1:2 title 'BZ' with lines linewidth 5 set term postscript eps color set output '2008.eps' replot Further postprocessing is possible (in this specific case, I used awk, LaTeX, and a sh wrapper for automated document generation and data export files). Basically, you can use gnuplot without a control file - in most cases, the data files will be plotted as you expect, or you can embed the data in the control files (only useful for smaller amounts of data and "single use" situations, or for experimenting with the parameters). For similarly structured data, you can use one control file to process many input data files. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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