gnuplot epslatex终端不显示x轴标签问题求助

我使用gnuplot的epslatex终端生成绘图，但生成的图中X轴标签"My Label"缺失，以下是我的最小可复现脚本和LaTeX引用代码：

Gnuplot脚本代码 #

set title font "Monospaced,13"
set grid

f(x) = 5 * log(x) / log(2) 
g(x) = 5 + sqrt(5 + x)

F = '$5 \log_2(x)$'
G = '$5 + \sqrt{5 + x}$'

# set yrange [0:300]
set xrange [0:4000]
set xlabel 'My Label'

set style line 1 linecolor rgb '#a82828' linetype 1 linewidth 5 pointtype 5 pointsize 1.5
set style line 2 linecolor rgb '#516db0' linetype 1 linewidth 5 pointtype 9 pointsize 1.5

plot f(x) title F with lines ls 1, g(x) title G with lines ls 2 

set terminal epslatex background rgb "grey" standalone size 10.0cm,10.0cm color colortext
set output 'RunTimeComparisonTreeIndexed.tex'

set style rect fc rgb "white" fs
set object 1 rectangle from screen 0,0 to screen 1,1 behind
set key left top box lt -1 lw 2 opaque

replot
exit

LaTeX引用代码 #

\begin{figure}[!h]
\centering
%\setlength{\voffset}{0cm}
%\setlength{\hoffset}{0cm}
\includepdf[pages={1},pagecommand={},width=0.5\textwidth]{RunTimeComparisonTreeIndexed.pdf}
%\setlength{\voffset}{- 10cm}
%\setlength{\hoffset}{-10cm}
\label{fig:rtcti}
\caption{Hello}
\end{figure}

问题原因 #

问题出在终端设置与绘图命令的顺序：你先执行了plot命令，之后才切换到epslatex终端，最后用replot重新绘制。但gnuplot切换终端时，会重置部分与终端渲染相关的参数（包括坐标轴标签），导致之前设置的xlabel在replot时未生效。

解决办法 #

有两种可行的修正方式：

方式1：先设置终端，再配置所有绘图参数 #

将set terminal和set output放在最前面，确保所有绘图设置（包括坐标轴标签）都在目标终端生效后执行：

# 先设置终端与输出文件
set terminal epslatex background rgb "grey" standalone size 10.0cm,10.0cm color colortext
set output 'RunTimeComparisonTreeIndexed.tex'

set title font "Monospaced,13"
set grid

f(x) = 5 * log(x) / log(2) 
g(x) = 5 + sqrt(5 + x)

F = '$5 \log_2(x)$'
G = '$5 + \sqrt{5 + x}$'

set xrange [0:4000]
set xlabel 'My Label'

set style line 1 linecolor rgb '#a82828' linetype 1 linewidth 5 pointtype 5 pointsize 1.5
set style line 2 linecolor rgb '#516db0' linetype 1 linewidth 5 pointtype 9 pointsize 1.5

set style rect fc rgb "white" fs
set object 1 rectangle from screen 0,0 to screen 1,1 behind
set key left top box lt -1 lw 2 opaque

# 直接绘制，无需replot
plot f(x) title F with lines ls 1, g(x) title G with lines ls 2 

exit

方式2：切换终端后重新设置坐标轴标签 #

如果需要保留原有命令顺序，可在切换终端后重新设置xlabel，确保参数在目标终端中生效：

set title font "Monospaced,13"
set grid

f(x) = 5 * log(x) / log(2) 
g(x) = 5 + sqrt(5 + x)

F = '$5 \log_2(x)$'
G = '$5 + \sqrt{5 + x}$'

set xrange [0:4000]

set style line 1 linecolor rgb '#a82828' linetype 1 linewidth 5 pointtype 5 pointsize 1.5
set style line 2 linecolor rgb '#516db0' linetype 1 linewidth 5 pointtype 9 pointsize 1.5

plot f(x) title F with lines ls 1, g(x) title G with lines ls 2 

set terminal epslatex background rgb "grey" standalone size 10.0cm,10.0cm color colortext
set output 'RunTimeComparisonTreeIndexed.tex'

# 切换终端后重新设置xlabel
set xlabel 'My Label'

set style rect fc rgb "white" fs
set object 1 rectangle from screen 0,0 to screen 1,1 behind
set key left top box lt -1 lw 2 opaque

replot
exit

内容的提问来源于stack exchange，提问作者coderodde