This is just some quick code to display a logfile of CSV floating point numbers, refreshing at 1Hz. If there is no data for 30s, the program will quit, and save a postscript file of the graph. directory="/home/laurence/Desktop/octave/"; write=sprintf("%sdatadump.txt",directory); read=sprintf("%sdatalog.txt",directory); filename=sprintf("%sresults.eps",directory); [fid,msg]=fopen(write,"w"); disp(msg); [fir,msg2]=fopen(read,"r"); disp(msg2); fputs(fid,"Octave logger control"); count=zeros(1,10); disp("\nsetup done\n"); count(30)=1; while(count(30)>count(1)) #our file is getting bigger [fir,msg2]=fopen("/home/laurence/Desktop/octave/datalog.txt","r"); #puts(msg2); [x,count(30)]=fscanf(fir,"%f,%f",Inf); #disp(count(30)); for n=1:29 count(n)=count(n+1); #buffer endfor if count(29)>count(28) b=length(x); a=x(1:2:b); b=x(2:2:b); plot(a,"3") hold on; plot(b,"1"); title("Datatrace"); replot(); endif sleep(1) endwhile print(filename,"-depsc2"); closeplot(); fclose(fid); fclose(fir);