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 #64170 is a reply to message #64022]

Tue, 02 December 2008 11:42

erano
Messages: 22
Registered: November 2008

Junior Member

On Dec 2, 8:59 pm, Paolo <pgri...@gmail.com> wrote:
> erano wrote:
>
>>> But you haven't really described how you got dX and dY and
>>> what is the potential....
>
>> Well, dX and dY are based on other parameters gradient. I based on
>> MATLAB code. In MATLAB, we can use "\" for doing Ax=Y: x=A\Y, where A
>> is M*N matrix. I can attach the code.
>
> My question was what are dX and dY? What is the potential?
>
> In IDL you can do x=A#invert(Y) that I guess is similar
> to what matlab does (modulo transposition of the arrays).
>
> But if A is large and sparse, then use the sparse methods suggested.
>
> Paolo
>
>
>
>
>
>> Eran- Hide quoted text -
>
> - Show quoted text -

The potential ia not relevant. The dX and dY can be based on any 2D
function. And yes, A is (very) large and sparse, but the sparse
methods are only for N*N matrix...while A is M*N.

Eran

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: Thu Oct 09 02:46:48 PDT 2025

Total time taken to generate the page: 0.86554 seconds