[SOLVED] Octave (v3.2): initialize vector/matrix without screen output

crts · 10-22-2010, 04:03 PM

Hi,

I have recently installed Octave on my desktop and I am very busy with RTFM ATM.
However, this manual is huge and I could not find an answer to my problem. What I basically want to do is initialize a vector like

Code:

a=[]
for i 1:100
  a = [ a i ]
endfor

Now my problem is that this will call the pager and I have to hit 'q' to get my prompt back. I know I can turn it off but the screen will still get cluttered with tons of output.
Is there a way to initialize 'a' quietly without any screen output?

terry-duell · 10-22-2010, 04:49 PM

Quote:

Originally Posted by crts

Hi,

I have recently installed Octave on my desktop and I am very busy with RTFM ATM.
However, this manual is huge and I could not find an answer to my problem. What I basically want to do is initialize a vector like...
[snip]

There is an Octave mailing list, which is where you can be sure to get some help.
Try <https://www-old.cae.wisc.edu/mailman/listinfo/help-octave>

Cheers,
Terry

crts · 10-23-2010, 08:37 AM

Ok,

after some more RTFM I found a workaround to the problem. You can open /dev/null for writing and assign it to a filedescriptor. Then you can use the fdisp() function to send all the output to that "file".
Procedure:

Code:

dnul = fopen("/dev/null","w")
a=[]
for i 1:100
  fdisp(dnul, a=[a i])
endfor

This will produce not output on the screen and initialize the matrix/vector 'a' quietly.

@terry: Thanks for the link, but I did not want to subscribe to the list (yet). I will keep it in mind though.