octave linux下安装运行问题

１安装gnuplot用于plot画图

https://sourceforge.net/projects/gnuplot/files/gnuplot/

２安装octave

https://octave.en.softonic.com/download

3 运行时plot错误

octave:1> x = [1 4 90] x = 1 4 90 octave:2> plot(x) error: popen2: popen2 (child): unable to start process -- No such file or directory error: called from: error: octave-3.8.1/scripts/plot/util/private/__gnuplot_open_stream__.m at line 30, column 40 error: octave-3.8.1/scripts/plot/util/__gnuplot_drawnow__.m at line 72, column 19 sh: 1: : Permission denied error: 'unset' undefined near line 1 column 1 warning: broken pipe

octave-3.8.1/scripts/plot/util/private/__gnuplot_open_stream__.m

进行临时修改：

27 function plot_stream = __gnuplot_open_stream__ (npipes, h) 28 [prog, args] = gnuplot_binary (); 29 if (npipes > 1) 30 [plot_stream(1), plot_stream(2), pid] = popen2 ("gnuplot", args{:}); 31 if (pid < 0) 32 error ("__gnuplot_open_stream__: failed to open connection to gnuplot"); 33 else 34 plot_stream(3) = pid; 35 endif 36 else 37 plot_stream = popen (sprintf ("%s ", prog, args{:}), "w"); 38 if (plot_stream < 0) 39 error ("__gnuplot_open_stream__: failed to open connection to gnuplot"); 40 endif 41 endif 42 if (nargin > 1) 43 set (h, "__plot_stream__", plot_stream); 44 endif 45 endfunction

也可以设定（gnuplot_binary()为具体的plot执行体）

octave:1> gnuplot_binary ('gnuplot'); octave:2> x = [1 30 980] x = 1 30 980 octave:3> plot(x)