gnuplot Python API

源文件

 #!/usr/bin/env python

 from os import popen

 class gnuplot_leon:
 # Author : Leon  Email: yangli0534@gmail.com
 # a gnuplot api of python

     def __init__(self):
         self.gnuplot = popen('gnuplot','w')
         self.write = self.gnuplot.write
         self.flush = self.gnuplot.flush
         self.close = self.gnuplot.close
         #return gp

     def set_plot_size(self,x=0.85,y=0.85):
         self.write(''.join(['set  size ',str(x),' ,',str(y),'\n']))
         #self.write(''.join(['set term png size ',str(x),' ',str(y),'\n']))
         #self.flush()

     def set_canvas_size(self,x=600,y=400):
         #self.write('set size 0.85, 0.85\n')
         self.write(''.join(['set term png size ',str(x),' ',str(y),'\n']))

     def set_title(self,title='gnuplot'):
         self.write(''.join(['set title "{/Times:Italic ',str(title), '}"\n']))
         self.write('set title  font ",10"  norotate tc rgb "white"\n')

     def set_gif(self):
         self.write('set terminal gif animate\n')

     def set_png(self):
         self.write('set terminal png\n')

     def set_file_name(self,filename='gnuplot.gif'):
         self.write(''.join(['set output ', '"',str(filename) ,'"','\n']))

     def set_tics_color(self,color='orange'):
         self.write(''.join(['set tics textcolor rgb ','"',str(color),'"','\n']))

     def set_border_color(self,color='orange'):
         self.write(''.join(['set border lc rgb ','"',str(color),'"','\n']))

     def set_grid_color(self,color='orange'):
         self.write(''.join(['set grid lc rgb ','"',str(color),'"','\n']))

     def set_bkgr_color(self,color='orange'):
         self.write(''.join(['set object 1 rectangle from screen 0,0 to screen 1,1 fc rgb ','"',str(color),'"',' behind\n']))

     def set_xlabel(self,text='x',color='white'):
         self.write(''.join(['set xlabel " {/Times:Italic distance: ', str(text) ,' } " tc rgb ','"',str(color),'"',' \n']))

     def set_ylabel(self,text='x',color='white'):
         self.write(''.join(['set ylabel " {/Times:Italic distance: ', str(text) ,' } " tc rgb ','"',str(color),'"',' \n']))

     def auto_scale_enable(self):
         self.write('set autoscale\n')

     def set_key(self,onoff='off ',text='gnuplot',color='white'):
         self.write('unset key\n')
         self.write(''.join(['set key ',str(onoff),' title "',str(text),'" textcolor rgbcolor "',str(color),'"\n']))
         #self.write('show key\n')

     def set_x_range(self,start,end):
         self.write(''.join(['set xrange [ ',str(start),':',str(end),']\n']))

     def set_y_range(self,start,end):
         self.write(''.join(['set yrange [ ',str(start),':',str(end),']\n']))

     def set_frame_start(self,linestype = 'l',linewidth=3,l_color='green,'):
         #self.write('plot "-" w l  lw 1.5 lc rgb "green"\n')
         self.write(''.join(['plot "-"  notitle w ',str(linestype),' lw ', str(linewidth), ' lc rgb ', '"', str(l_color),'" \n'])) 

     def update_point(self,x,y):
         self.write(''.join([str(x),' ',str(y),'\n']))

     def set_frame_end(self):
         self.write('e\n')

     def set_output_valid(self):
         self.write('set output\n')

     def close(self):
         self.close()

例'1

 #!/usr/bin/env python

 import sys
 import math
 import os
 from gnuplot_leon import *

 # Author : Leon  Email: yangli0534@gmail.com
 # fdtd simulation , plotting with gnuplot, writting in python
 # perl and gnuplot software packages should be installed before running this program
 # 1d fdtd with absorbing boundary and TFSF boundary between [49] and [50]
 # lossy dielectric material localted at > ez[150]

 gp = gnuplot_leon()

 gp.set_plot_size(1,1)
 gp.set_canvas_size(600,800)
 gp.set_title('fdtd simulation by leon : gnuplot class test')
 title = 'fdtd simulation by leon,yangli0534\\\\@gmail.com'
 #gp.write('set terminal gif animate\n')
 gp.set_title(title)
 #gp.set_gif()
 gp.set_png()
 gp.set_file_name('demo1.png')
 gp.set_tics_color('white')
 gp.set_border_color('orange')
 gp.set_grid_color('orange')
 gp.set_bkgr_color('gray10')
 gp.set_xlabel('length','white')
 gp.set_ylabel('amplitude','white')
 gp.auto_scale_enable()
 gp.set_key('off','sin(x)','white')

 size = 400#physical distance

 sinwave=size * [0.00]# 

 cnt = 0
 elem = 0.00000
 pi = 3.14159265358979323846
 #gp.write(''.join(['set xrange [0:',str(size),'-1]\n']));
 gp.set_x_range(0,size-1)
 #for i in range(0,size):
 #    sinwave[i] = 0.0

 for mm in range(0, size-1):
     sinwave[mm] = math.sin(2*pi*mm/size)

 gp.set_frame_start('l', 3, 'green')
 cnt = 0
 for elem in sinwave:
     gp.update_point(cnt,elem)
     #print ''.join([str(cnt),':',str(elem),'\n'])
     cnt +=  1
 gp.set_frame_end()
 gp.set_key('off','sin(x)','white')
 gp.set_output_valid()
 gp.close()

例2

 #!/usr/bin/env python

 import sys
 import math
 import os
 from gnuplot_leon import *

 # Author : Leon  Email: yangli0534@gmail.com
 # fdtd simulation , plotting with gnuplot, writting in python
 # perl and gnuplot software packages should be installed before running this program
 # 1d fdtd with absorbing boundary and TFSF boundary between [49] and [50]
 # lossy dielectric material localted at > ez[150]

 gp = gnuplot_leon()

 gp.set_plot_size(0.85,0.85)
 gp.set_canvas_size(600,400)
 #gp.set_title('fdtd simulation by leon : gnuplot class test')
 title = 'fdtd simulation by leon,yangli0534\\\\@gmail.com'

 gp.set_title(title)
 gp.set_gif()
 #gp.set_png()
 gp.set_file_name('demo2.gif')
 gp.set_tics_color('white')
 gp.set_border_color('orange')
 gp.set_grid_color('orange')
 gp.set_bkgr_color('gray10')
 gp.set_xlabel('length','white')
 gp.set_ylabel('amplitude','white')
 gp.auto_scale_enable()
 gp.set_key('off','sin(x)','white')

 size = 400#physical distance
 ez=size * [0.00]#electric field
 hy=size * [0.00]#magnetic field
 ceze=size * [0.00]#
 cezh=size * [0.00]#
 chye=size * [0.00]#
 chyh=size * [0.00]#
 #sinwave=size * [0.00]#
 imp0 = 377.00
 LOSS = 0.01
 LOSS_LAYER = 250
 MaxTime = 18000
 cnt = 0
 elem = 0.00000

 gp.set_x_range(0,size-1)
 for i in range(0,size):
     ez[i] = 0.0
     hy[i] = 0.0
     #sinwave[i] = 0.0
     if (i < 100):
         #$epsR[$i] = 1.0;
         ceze[i] = 1.0
         cezh[i] = imp0
     elif(i < LOSS_LAYER):
         #$epsR[$i] = 1.0;
         ceze[i] = 1.0
         cezh[i] = imp0/9.0
     else :
         #$epsR[$i] = 9.0;
         ceze[i] = (1.0-LOSS)/(1.0+LOSS)
         cezh[i] = imp0 / 9 /(1.0+LOSS)
     if( i < LOSS_LAYER):
         chye[i] = 1.0/imp0
         chyh[i] = 1.0
     else:
         chye[i] = 1.0/imp0/(1.0+LOSS)
         chyh[i] = (1.0-LOSS)/(1.0+LOSS)
 for qTime in range(0, MaxTime):
     # update magnetic field
     for mm in range(0, size-1):
         hy[mm] = hy[mm]*chyh[mm] + (ez[mm+1]-ez[mm])*chye[mm]
         #sinwave[mm] = math.sin(mm/size*2*pi)
     hy[49] = hy[49]-math.exp(-(qTime - 30.0)*(qTime - 30.0)/100.0)/imp0
     # update electric field
     ez[0] = ez[1]#abc
     #$ez[$size-1] = $ez[$size-2];
     for mm in range(1, size-1):
         ez[mm] = ez[mm]*ceze[mm] + (hy[mm] - hy[mm-1])*cezh[mm]
     if(qTime % 30 == 0):
         gp.set_frame_start('l', 3, 'green')
         cnt = 0
         for elem in ez:
             gp.update_point(cnt,elem)
             cnt +=  1
         gp.set_frame_end()
     ez[50] =  ez[50]+math.exp(-(qTime +0.5-(-0.5)- 30.0)*(qTime +0.5-(-0.5)- 30.0)/100.0);
 #gp.write('set output\n')
 #gp.close()
 gp.set_output_valid()
 gp.close()