Re: problem with matrices operator

[Carlo de Falco]

On 9 Oct 2009, at 04:44, febty febriani wrote:

> for year in 2009
> do
> for month in 01 ....12 (12 months)
> do
> for day in 01 ....31 (31 days)
> do
> for hour in 00....23  (23 hours)
> do
> for min in 00
> do
> for  sec in 00
> do
>
>      dir=......   (I define my folder, because I use different  
> folder for data, result and program. It is just for folder  
> arrangement )
>
> octave -q <<EOF
>
> octave scripts
>
> EOF

you could do the same just with an octave script

----------8<--------------
#!/path/to/octave ##so that you can run the script from bash

year=2009
for month=1:12
  for day=1:31
    for hour=0:23
      min=0; sec=0;
      dir=<...>;
      filename=sprintf("%s/data-1day-1Hz/fft-%d%2.2d.dat", dir, year,  
month);
      fid=fopen(filename,"r"); # or:
                               # load (filename);

      ## other octave commands

      plot (...)
      print (...) ## to save the plot to a file

      fclose (fid)
    endfor
  endfor
endfor
----------8<--------------

this should be __MUCH__ faster as it would not fire up many
different instances of octave and gnuplot.

HTH,
c.