如何在Gnuplot的三维绘图中向二维曲线添加指定颜色？

我的工作代码如下：

set term postscript eps enhanced color
set output "C:\\Users\\cole1\\Desktop\\gnuplot_w1.eps"
set multiplot
set isosamples 140
unset key
set title "r"
set xrange [-6:6]
set yrange [-6:6]
set zrange [-4:4]
set hidden3d nooffset
# set style arrow 1 lw 2 head filled size 0.1,20,70
unset key
# set ztics 1
set view 69,120 #Done implicitly by mousing.
# set arrow 1 nohead from 0,0,0 to 0,0,4.0 as 1 back
# set arrow 2 nohead from 0,0,0 to 0,4.5,0 as 1 back
# set arrow 3 nohead from 0,0,0 to 4.5,0,0 as 1 back
splot (x**2+y**2+1)**(0.5),-(x**2+y**2+1)**(0.5)
# set arrow 4 nohead from 0,0,2.5 to 0,0,4.0 as 1 front
unset xtics 
unset ytics 
unset ztics  
set parametric
set samples 1000
plot 0.1*sin(25*t)-1,0.1*cos(25*t)-0.5 lw 1
plot 0.06*sin(25*t)-1.25,0.06*cos(25*t)+2.75 lw 3
unset xtics 
unset ytics 
unset multiplot

然后，我尝试将第一条曲线（上面最后第五条线）更改为绿色，以使第一条曲线显示为绿色

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它给了我一个

无效命令

错误。如何解决此问题？

您需要使用

linecolor

命令

plot 0.1*sin(25*t)-1,0.1*cos(25*t)-0.5 lw 1 lc rgb "green"

plot 0.1*sin(25*t)-1,0.1*cos(25*t)-0.5 lw 1 lc rgb "green"