gnuplot:没有足够的列用于可变颜色 [英] gnuplot: Not enough columns for variable color

问题描述

我正在执行以下gnuplot脚本:

I am executing the following gnuplot script:

set title "Efficiency scatter plot"
set xlabel "perf_1"
set ylabel "secondary report"
set log x
set log y
set xrange [0.1:40.0]
set yrange [0.1:40.0]
set terminal png medium
set output "./graph1.png"
set size square
set multiplot
set pointsize 0.3
set style line 6 pt 6
set datafile separator ","
set border 3
set xtics nomirror
set ytics nomirror
plot '/tmp/data.csv' using 3:1 with points pt 1 lt 3  lc var title     "perf_20140113131309", \
 '/tmp/data.csv' using 3:2 with points pt 1 lt 1  lc var title "perf_1"
plot x notitle
plot 2*x notitle
plot 0.5*x notitle

获得以下错误消息

 "script.gnuplot", line 20: Not enough columns for variable color

能不能请我指导以找出我在做错什么.

Could you please guide me in order to find what I am doing wrong.

通过gnuplot版本为"4.6 patchlevel 3"的方式，使用的data.csv文件为

By the way the gnuplot version is '4.6 patchlevel 3' the data.csv files used is

 0.1,0.1,40.0
 0.14,0.14,40.0
 0.32,0.32,40.0
 0.7,0.74,40.0

提前谢谢！

推荐答案

这意味着您需要在using语句中再指定一列:第一个是x坐标，第二个是y-坐标.缺少用于可变线条颜色的一个.

That means, that you need to specify one more column in your using statement: The first one is the x-coordinate, the second one the y-coordinate. The one for the variable line color is missing.

使用例如

plot '/tmp/data.csv' using 3:1:0 with points pt 1 lt 3 lc var

使用行号(第零列)作为linetype索引.您也可以使用linecolor palette，因此从当前定义的调色板中选择颜色.

to use the row number (zeroth column) as linetype index. You can also use e.g. linecolor palette so select the color from the currently defined color palette.

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