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From: Felix Roth <felix.gerhard.roth@googlemail.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Histograms: bar width differs
Date: Sat, 2 Jul 2011 05:38:12 -0700 (PDT)
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On 2 Jul., 11:56, Felix Roth <felix.gerhard.r...@googlemail.com>
wrote:
> Dear all,
>
> I am currently writing my master thesis and use gnuplot to visualize
> the generated data. So far it has been working fine, but the bar width
> in my histograms differs. I call gnuplot from a java program, the
> command list looks like this:
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set terminal png font
> 'Times-Roman, 9' \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set key right top \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set datafile separator ','\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 String co=
mmand =3D "set output 'D:\\\\Dokumente\\\\My Dropbox\\\\Uni\
> \\\Semester =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 4\\\\CSV\\\\" + graphName +"'=
\n";
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
(command);
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set xtics 1\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set ytics 10\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set xlabel 'rounds'\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set ylabel 'values'\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set yrange [0:120]\n");
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 1 lt 1 lw 1 lc rgb 'red' \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 2 lt 1 lw 1 lc rgb 'forest-green' \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 3 lt 1 lw 1 lc rgb 'royalblue' \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 4 lt 1 lw 1 lc rgb 'purple' =A0\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 5 lt 1 lw 1 lc rgb 'gold' \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style line 6 lt 1 lw 1 lc rgb 'orange' \n");
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style data histograms \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style histogram clustered gap 2 \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set style fill solid border -1 \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("set boxwidth -2 \n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 command =
=3D "plot " + modifiedCSVFile + " using 2 ls 1 title
> columnheader(2)," +
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 modifiedC=
SVFile + " using 3 ls 2 title columnheader(3)," +
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 modifiedC=
SVFile + " using 4 ls 3 title columnheader(4)," +
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 modifiedC=
SVFile + " using 5 ls 4 title columnheader(5)," +
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 modifiedC=
SVFile + " using 6 ls 5 title columnheader(6)," +
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 modifiedC=
SVFile + " using 7 ls 6 title columnheader(7)\n";
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
(command);
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.write=
("quit\n");
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.flush=
();
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 out.close=
();
>
> Out is a buffer used to communicate with gnuplot and I have to add \n
> to each command to finish each input. The resulting plot looks like
> this:http://tinypic.com/r/wivlw5/7
> My data file is a .csv file with following entries:
> round,interactions,crossing interactions,execution time
> (ms),communication cost,reassignments,overloaded peers
> 1,5,30,194,40,0,0
> 2,5,30,112,40,0,0
> 3,5,30,105,40,0,0
> 4,5,30,88,40,13,0
> 5,5,30,100,40,12,0
> 6,4,31,85,40,12,0
> 7,4,31,71,40,11,0
> 8,4,31,119,40,14,0
> 9,4,31,281,40,0,0
> 10,4,31,182,40,0,0
> 11,4,31,231,40,12,0
> 12,4,31,241,40,0,0
> 13,4,31,237,40,0,0
> 14,4,31,199,40,0,0
> 15,4,31,330,40,14,0
>
> Any suggestions how to fix this problem? I am completely stumped.
>
> Thanks in advance!

Update: I have replaced set xticks with set autox and strangely this
seems to help.