R: help on Octave

[Pierpaolo]

I'm sorry, I improperly used crash word. There is only the error message of 
memory exhausted.
You had suggest me to use sparse matrix, I have to invert and multiply this 
matrix (I read to avoid the use of inv function with sparse matrix), 
furthermore I have to modify a lot of this elements. Is sparse array the right 
way to use big matrix?

>This matrix isn't small. It would occupy approximately 4.5 gigabytes of 
>>memory, if stored in full. This is more RAM than you have. Octave needs 4.5 
>>bytes of *contiguous* memory available, so even if you had enough RAM to 
>>store it, memory fragmentatiion might prevent you from loading this matrix 
>>into memory.


Thanks a lot

Pierpaolo


-----Messaggio originale-----
Da: address@hidden [mailto:address@hidden Per conto di Jordi Gutiérrez Hermoso
Inviato: martedì 26 giugno 2012 15:21
A: Pierpaolo
Cc: address@hidden
Oggetto: Re: help on Octave

On 26 June 2012 09:01, Pierpaolo <address@hidden> wrote:
> With a “small” matrix (6200x6200) I had a crash with previous error string.

By the way, do you really mean "crash"? A crash is when the operating
system sends a signal to Octave and Octave abruptly terminates and it
almost always indicates a bug in Octave (in Windows, you might see
something like "this program has performed an illegal operation and
must be shut down"). If you just saw an error message, then there is
no bug in Octave, but if there is, please report it.

- Jordi G. H.