gnuplot learn note

gnuplot learn note

设置terminal类型

set terminal wxt

wxt terminal弹出新的窗口，绘制2D图像

The wxt terminal device generates output in a separate window. The window is created by the wxWidgets library, where the 'wxt' comes from. The actual drawing is done via cairo, a 2D graphics library, and pango, a library for laying out and rendering text. 

Syntax: 

        set term wxt {<n>}
                     {size <width>,<height>} {position <x>,<y>}
                     {background <rgb_color> | nobackground}
                     {{no}enhanced}
                     {font <font>} {fontscale <scale>}
                     {title "title"}
                     {linewidth <lw>} {butt|rounded|square}
                     {dashlength <dl>}
                     {{no}persist}
                     {{no}raise}
                     {{no}ctrl}
                     {close}

set terminal dumb

dumb terminal绘制asicii art图形，直接在term看到结果，方便重定向到文本文件

The dumb terminal driver plots into a text block using ascii characters. It has an optional size specification and a trailing linefeed flag. 

Syntax: 

      set terminal dumb {size <xchars>,<ychars>} {[no]feed}
                        {aspect <htic>{,<vtic>}}
                        {[no]enhanced}
                        {mono|ansi|ansi256|ansirgb}

where <xchars> and <ychars> set the size of the text block. The default is 79 by 24. The last newline is printed only if feed is enabled. 

1. 当前terminal type

show terminal

2. terminal type保存/恢复

set terminal push：保存当前工作状态terminal type

set terminal pop：恢复上一次terminal type

3. reference

• output terminals

绘制函数

绘制单个函数

> plot [a:b] function

[a:b]指定函数区间（可省略），function指定函数

绘制多个函数

各个函数用逗号分隔

导出函数数据

set table 'file'	#设置存储数据文件，必须要加上单引号
plot function		#导出数据
unset table			#退出数据导出模式，进行数据绘制
plot 'file'			#通过文件中的数据绘制图形，必须要加上单引号

设定不同区间x/y

1. gnuplot可以设定两组不同区间x/y,xtics/x2tics,ytics/y2tics分别表示
2. set y2tics 0,10：0为y轴起始值，10为步长

绘制柱状风格图

1. plot function with boxes

绘制填充曲线

1. plot function with filledcurves above y1=0.07

坐标轴设置

x轴设定

1. set xrange [-1:1]：设置x轴区间为-1到1
2. set xtics -1,0.2：设置x轴起始值为-1，刻度步长为0.2
3. set xlable：设置横轴标签
4. 上述设定同样适用于x2lable,x2tics,x2range

y轴设定

1. set yrange [-1:1]：设置y轴区间为-1到1
2. set ytics -1,0.2：设置y轴起始值为-1，刻度步长为0.2
3. set ylable：设置横轴标签
4. 上述设定同样适用于y2lable,y2tics,y2range

表头

1. set title ‘chart name’

绘图颜色/类型

REFERENCE

use test command to generate this picture

颜色设置

1. plot function linecolor rgb ‘color’ linecolor可以缩写为lc

   

   

设置linestyle

1. 定义linestyle

   set style line 1 linecolor red linetype 2

   set style line 2 lc green lt 5

2. 引用linestyle

   plot function ls n

   

   

设置plot style

设置plot size

1. set terminal size num1,num2

设置绘图/画布占比

1. set size num1,num2 num1和num2的设置的范围为0~1，默认为1，填满画布

   set size 0.4,0.4
   

   

   set size 0.8,0.8
   

   

刻度设置

最小刻度

set gride			#打开参考点
set mxtics number	#设置横轴刻度间格数
set mytics number	#设置纵轴刻度间格数