Draw 2-D contour figure using Octave

Like previous writings, drawing the contours of diffraction wave 2 dimensions by using python. We may also use Octave for drawing contours 2 dimensions of the diffraction of waves propagated through the crack surfaces (example taken), in addition to using Python, Matlab, Scilab, and so on.

The File will be in ASCII format read surely in 2 dimensions (an example file can be downloaded).

File to read it is called "baca_data." m ". The Script of this file is as follows,




—————————————- baca_data.m —————————————

#! /usr/bin/octave -qf
fid = fopen(’scen-7.pma’,'r’);
nl = fscanf(fid,’%g %g %g %g %g %g %g %g %gn’,[1 7]);
N = nl(1,1);
M = nl(1,2);
axmin = -2;
axmax =  2;
[x y] = meshgrid(0:100,0:100);
b  = fscanf(fid,’%e’,[N M]);
caxis([axmin axmax]);
su(x,y,b);
colormap(’jet’);
colorbar;
axis([0, 100, 0, 100],”ij”);
print surf_octave.png;

—————————————- baca_data.m —————————————


When the file is over run with the command,

abuadnan@abuadnan-laptop:~/Documents$ ./baca_data.m

Then it will get the file contourf_octave. png as follows,

Figure 1. Contour Image File generated from a script Octave (baca_data.m)

Figure 1 is a picture generated from a script file with the name Octave "baca_data m" run like the procedure above. Where this script reads the data file in ASCII format with the name "scen-7. foreign direct investment". The File is run and the resulting figure 1 above

So, hopefully this is helpful to all users of linux or windows using the Octave as a free program (free softwares). This example File can be downloaded from here (101,2 Kb)