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Re: diagonal dominant [message #83047 is a reply to message #82948]

Wed, 30 January 2013 08:23

Gompie
Messages: 76
Registered: August 2012

Member

I basically want to solve AX=B.

When I give determ(A) idl gives 0.0000 with floating point exception. So I am not sure if idl does a good job at getting inverse.

So, I wanted to use gauss elemination on A matrix and apply the routine gs_iter.pro. The routine says that the input matrix should be diagonal dominant. So I thought if by pivoting I can make the array diagonally dominant.

While A is a (256,256) matrix. I have the flexibility of replacing rows in A with new ones if the A is singular with a particular set of rows.

Any ideas.
Gompie

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		Re: diagonal dominant By: lecacheux.alain on Wed, 30 January 2013 08:05
		Re: diagonal dominant By: Gompie on Wed, 30 January 2013 08:23

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