[英]Gnuplot does not plot negative values
Data file bipdeutschland.csv: 数据文件bipdeutschland.csv:
1991 79.09 0
1992 80.61 1.9
1993 79.84 –1.0
1994 81.8 2.5
1995 83.19 1.7
1996 83.84 0.8
1997 85.37 1.8
1998 87.05 2
1999 88.78 2
2000 91.43 3
2001 92.98 1.7
2002 92.99 0
2003 92.32 –0.7
2004 93.41 1.2
2005 94.07 0.7
2006 97.56 3.7
2007 100.75 3.3
2008 101.81 1.1
2009 96.07 –5.6
2010 100.00 4.1
2011 103.59 3.6
2012 103.98 0.4
2013 104.09 0.1
2014 105.76 1.6
PLT file: PLT文件:
set xdata time
set timefmt "%Y"
set format x "%Y"
set format y "%6.0f"
set xrange ["1990":"2015"]
set yrange [0:120]
set style fill solid 1.0
set boxwidth 0.85 relative
set xlabel "Jahr"
set ylabel "Reales Bruttoinlandsprodukt (2010=100%)"
set y2range [-5:5]
set y2label "Veränderung des Bruttoinlandsprodukts zum Vorjahr (in %)"
set y2tics 2
set ytics nomirror
set xtics nomirror
set output "bipdeutschland.png"
set term png size 1000, 500
plot "bipdeutschland.csv" using 1:2 title '' w boxes lc rgb "green", "bipdeutschland.csv" using 1:3 title '' with lines lw 4 lc rgb "red" axes x1y2;
The red line should be in the negative range for 1993, 2003 and 2009, but it clearly isn't. 红线应该在1993年,2003年和2009年的负范围内,但显然不是。 Where is the problem, does gnuplot fails to parse the input file or is my code wrong?
问题在哪里,gnuplot无法解析输入文件或我的代码是错误的吗?
Your data file is wrong. 您的数据文件错误。 If you look closely at your output you see, that the points with negative values are skipped.
如果仔细观察输出,则会跳过带有负值的点。
The problem is, that instead of having a minus sign (U+002D), you have an en-dash (U+2013), so that gnuplot fails to parse the negative numbers, since the aren't numbers. 问题是,没有减号 (U + 002D),你有一个en-dash (U + 2013),因此gnuplot无法解析负数,因为它们不是数字。
Using the following, corrected data file 使用以下更正的数据文件
1991 79.09 0
1992 80.61 1.9
1993 79.84 -1.0
1994 81.8 2.5
1995 83.19 1.7
1996 83.84 0.8
1997 85.37 1.8
1998 87.05 2
1999 88.78 2
2000 91.43 3
2001 92.98 1.7
2002 92.99 0
2003 92.32 -0.7
2004 93.41 1.2
2005 94.07 0.7
2006 97.56 3.7
2007 100.75 3.3
2008 101.81 1.1
2009 96.07 -5.6
2010 100.00 4.1
2011 103.59 3.6
2012 103.98 0.4
2013 104.09 0.1
2014 105.76 1.6
does also give the correct output using your script: 还使用您的脚本提供正确的输出:
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