comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » inverse gradient

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: inverse gradient [message #64455 is a reply to message #64183]

Wed, 24 December 2008 01:55

erano
Messages: 22
Registered: November 2008

Junior Member

On Dec 9, 10:36 am, erano <eran.o...@gmail.com> wrote:
> Just a short update :
> (I talked with IDL - ITT Technical Support)
> For solve A*x=b
> When I A is M*N array and i wish to make it sparse I must to add zeros
> to make it M*M (if M>N).
> If I wish to use LINBCG I must to have not zero values at diagonal.
> for all the new elements the diag shoult be set to 1.0, and I must to
> sort the old array rows (and the vector b as well) so the diag is
> full. It's working.

UPDATE: working only for small array, and not need to set to 1.0 the
diag

Report message to a moderator

[Message index]

		inverse gradient By: erano on Wed, 26 November 2008 02:10
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 10:59
		Re: inverse gradient By: erano on Tue, 02 December 2008 11:42
		Re: inverse gradient By: erano on Tue, 02 December 2008 10:50
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 09:20
		Re: inverse gradient By: erano on Tue, 02 December 2008 09:04
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 07:45
		Re: inverse gradient By: erano on Tue, 02 December 2008 07:12
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 06:45
		Re: inverse gradient By: erano on Tue, 02 December 2008 01:27
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:31
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:18
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:14
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:10
		Re: inverse gradient By: Jeremy Bailin on Fri, 28 November 2008 05:27
		Re: inverse gradient By: erano on Fri, 28 November 2008 01:31
		Re: inverse gradient By: Jeremy Bailin on Thu, 27 November 2008 06:24
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 14:44
		Re: inverse gradient By: erano on Tue, 09 December 2008 00:36
		Re: inverse gradient By: erano on Wed, 24 December 2008 01:55

Previous Topic:	Re: Problem reading data from stdin using EOF(0) in version 6.0 and 7.0
Next Topic:	installing and licensing IDL with FLEXnet

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 12:45:07 PDT 2025

Total time taken to generate the page: 0.71964 seconds