Re: help : how to load only a part of a matrix in octave

[tharaka weheragoda]

matrix is 32000*32000 and vector is 1*32000 .what i need is load only 
first 1000 rows of the matrix first and second 1000 rows next and so 
on.But the thing is i don't know how to load only that part instead of 
loading whole matrix.

On Sun, Jun 3, 2012 at 12:47 PM, Markus Bergholz <address@hidden> wrote:

On Sun, Jun 3, 2012 at 7:32 AM, tharaka weheragoda
<address@hidden> wrote:
> Hi everybody,
>   I have a huge matrix and a vector to multiply.Is there any way to load
> only a part of this huge matrix at a time when doing multiplication? looking
> forward a soon reply.

m(:,10:20) takes just columns 10 to 20 of you matrix.
m(5:10,:) takes just row 5 to 10 of you matrix
you can combine it too
m(2:8,12:15) takes row 2 to 8 and column 12 to 15.

but i don't know if this is what you want?

regards
markus

>
> Thanks in advance!
> tharaka
>
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