Multi-language support of gnuplot --- Using latex (2)

We have shown how to get multi-language support by using latex in the former posts. It works, but a little complicated --- You need to take two steps to get the final graph. In practice, it can be simplified by using an option of the (*)latex terminal. This option is "header". You can put the package use and other commands after this option, and then the generated tex file will contain these information at the header part. So you need not to modify the tex file manually. You get the final graph at one step.

So try the following plot script. Run it and compile the output tex file using latex, and at once you a Chinese supported graph.

reset
set term epslatex color standalone header \
"\\usepackage{CJK}\n \
\\AtBeginDocument{\\begin{CJK*}{GBK}{song}} \
\\AtEndDocument{\\end{CJK*}}"

set output "voltage.tex"

set xlabel "时间（秒）"
set ylabel "电压（伏）"
unset key
plot sin(x)+0.1*(2*rand(0)-1.) w l lw 2
set output 

Gnuplot plotted graph with Chinese support

gnuplot的多国语言支持----通过latex（1）

非英语用户经常遇到的一个问题就是在图像中插入非英语字符。对新手而言，有时这是一件很具挑战性的工作。该帖子将讨论如何使用latex来解决该问题。

我们知道通过使用合适的宏包latex可以进行多语言排版。我们还知道gnuplot的终端类型中包括诸如latex，epslatex等。所以我们可以先在这些终端类型下绘图，然后通过修改tex文件来获得图像的多国语言支持。下面以中文的支持为例来说明该问题。

首先我们使用下面的脚本来绘图。

reset
set term epslatex color standalone
set output "voltage.tex"
set xlabel "my xlabel"
set ylabel "my ylabel"
unset key
plot sin(x)+0.1*(2*rand(0)-1.) w l lw 2
set output

使用latex编译输出的tex文件，得到如下图片

无中文支持的gnuplot绘图结果

我们希望将x轴标注为“时间（秒）”，y轴标注为“电压（伏）”。为实现该效果，使用任意文本编辑软件打开tex文件，找到如下行

\put(4039,154){\makebox(0,0){\strut{}my xlabel}}%

和

\put(308,2739){\rotatebox{-270}{\makebox(0,0){\strut{}my ylabel}}}

然后将“my xlabel”替换为“时间（秒）”，将“my ylabel”替换为“电压（伏）”。同时将下面的代码加到文件的头部分来得到latex对中文的支持。

\usepackage{CJK}
\AtBeginDocument{\begin{CJK*}{GBK}{song}}
\AtEndDocument{\end{CJK*}}

此时再次编译tex文件就可以得到中文支持的的图片了。

中文支持的gnuplot绘图结果

修改前和修改后的tex可以通过下面链接下载。

voltage.tex  voltage_chinese.tex

Multi-language support of gnuplot --- Using latex

For some non-English speakers, inserting some their own characters into the graph is usual. And for some fresh, this some times becomes a challenging task. This posts will talk about how to solve this problem using latex.

We know that some packages used latex can deal with multi-language typesetting. And we also know that gnuplot have terminals like latex, epslatex. So we can first plot a English graph with these terminals, then modify the output tex files, and at last get a multi-language supported graph. Take Chinese support for example.

We first plot a graph using the following script.

reset
set term epslatex color standalone
set output "voltage.tex"
set xlabel "my xlabel"
set ylabel "my ylabel"
unset key
plot sin(x)+0.1*(2*rand(0)-1.) w l lw 2
set output

Compile the output tex file using latex we get a graph like the following one.

Gnuplot plotted graph without Chinese support

And we want to label the x-axes with "时间（秒）"(means time) and y-axes with "电压（伏）"(means voltage). To realize this effect, we open the tex file with any text editor and find lines

\put(4039,154){\makebox(0,0){\strut{}my xlabel}}%

and

\put(308,2739){\rotatebox{-270}{\makebox(0,0){\strut{}my ylabel}}}

Then we repalce "my xlabel" with "时间（秒）", "my ylabel" with "电压（伏）". And add the following codes into the header part of the file to get the chinese support of latex.

\usepackage{CJK}
\AtBeginDocument{\begin{CJK*}{GBK}{song}}
\AtEndDocument{\end{CJK*}}

This time compile the tex file uising latex again. And a chinese supported graph is gotten.

Gnuplot plotted graph with Chinese support

The modified and pre-modified tex files can be downloaded here.
voltage.tex  voltage_chinese.tex