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Re: SVDC procedure [message #88335 is a reply to message #88317]

Tue, 15 April 2014 11:47

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Monday, April 14, 2014 5:54:00 AM UTC-4, g.na...@gmail.com wrote:
> Does SVDC procedure works for under determined systems? I tried to solve my system but I ended up with negative value and it supposed to be all positive.
>
> Here are my matrices:
>
> A= [[21, 10, 6], [1,1,1]]
>
> b= [[570], [8070]]

Which value was negative? When I run
SVDC, A, w, u, v
then I get,
W = 24.0702 0.790450 -0.00000

None of those values is "negative." (-0 is still equal to zero) For an under-determined system one should expect some zero singular values.

Craig

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[Message index]

		SVDC procedure By: g.nacarts on Mon, 14 April 2014 02:54
		Re: SVDC procedure By: Craig Markwardt on Tue, 15 April 2014 11:47
		Re: SVDC procedure By: g.nacarts on Wed, 16 April 2014 04:07
		Re: SVDC procedure By: g.nacarts on Wed, 16 April 2014 04:09
		Re: SVDC procedure By: Craig Markwardt on Wed, 16 April 2014 11:51
		Re: SVDC procedure By: Mats Löfdahl on Wed, 16 April 2014 14:11
		Re: SVDC procedure By: g.nacarts on Wed, 16 April 2014 04:10

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