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Re: pseudo code for doing SVD on 2D sparse array [message #64470 is a reply to message #64399]

Tue, 23 December 2008 06:58

erano
Messages: 22
Registered: November 2008

Junior Member

On Dec 22, 5:07 pm, Jeremy Bailin <astroco...@gmail.com> wrote:
> On Dec 21, 6:41 am, erano <eran.o...@gmail.com> wrote:
>
>> Hi,
>> I wish to solve Ax=B
>> A is sparse array (size m*n), in format of [ x_index, y_index, value ]
>> B is vector length m
>> x is unknown vector length n
>> n=1,000,000
>> m=2*n
>
>> better to help with IDL code, but any idea is welcome!
>
>> Eran
>
> You said a couple of weeks ago that you'd gotten LINBCG to work on
> this... what problems are you having with it?
>
> -Jeremy.

Well, Yes and Not.
Basiclly, the LINBCG is working after the adding, but for large array
the output seems with mistakes in some rows...
so I'm looking for something better

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[Message index]

		pseudo code for doing SVD on 2D sparse array By: erano on Sun, 21 December 2008 03:41
		Re: pseudo code for doing SVD on 2D sparse array By: Evgenii Rudnyi on Mon, 22 December 2008 07:17
		Re: pseudo code for doing SVD on 2D sparse array By: Jeremy Bailin on Mon, 22 December 2008 07:07
		Re: pseudo code for doing SVD on 2D sparse array By: erano on Tue, 23 December 2008 06:58
		Re: pseudo code for doing SVD on 2D sparse array By: spellucci on Sun, 21 December 2008 08:30
		Re: pseudo code for doing SVD on 2D sparse array By: Brian Borchers on Sun, 21 December 2008 06:46

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