gnuplot png输出不绘制虚线/虚线

Question

我正在尝试使用gnuplot v4.4绘制包含虚线和连续线的图形.代码是:

set term postscript eps enhanced color
set style line 1 linetype 1 lw 2
set style line 2 linetype 1 lw 2 linecolor rgb 'green'
set style line 3 linetype 1 lw 2 linecolor rgb 'blue'
set style line 4 linetype 4 lw 2 linecolor rgb 'red'
set style line 5 linetype 3 lw 2 linecolor rgb 'blue'

set border lw 3
set xtics font ',18'
set ytics font ',18'
set output 'roc.ps'
set key right bottom
plot 'roc_fpdock_isc_test' u 1:2 w l ls 1 title "Full optimization, test set" ,x w l ls 2 title "Random", 'roc_fpdock_isc_training' u 1:2 w l ls 3 title "Full optimization, training set", 'roc_mini_pep_sc_training' u 1:2 w l ls 4 title "Minimization only, training set", 'roc_mini_pep_sc_test' u 1:2 w l ls 5 title "Minimization only, test set"

问题是,我无法将其绘制为png.当我将set term指令更改为:set term png enhanced我只获得连续的行.知道出了什么问题吗？

Answer 1

事实证明,我似乎无法在png终端中获得虚线(带有GD后端的线路).但是,如果你有cairo终端,你可以得到一个带虚线的png(假设你选择了合适的线型).

set term pngcairo dashed
set output "foo.png"
test
!display foo.png
!rm foo.png

顺便说一句,test是梦幻般的询问特定终端的行为将是什么.