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SVDC in IDL 5.0 [message #9884]

Wed, 17 September 1997 00:00

f055
Messages: 29
Registered: April 1995

Junior Member

A quick question about SVDC:

Most singular value decomposition routines I have used/read about
appear to return a diagonal matrix of singular values (or just a
list), in which the singular values are in descending order. When
I use the IDL routine SVDC,A,W,U,V, the list of values in W is not in
such an order (for one example I get W=[0,0.33,0.29E-7,0.12E-7,
0.14E-7,... etc.]).

Am I doing something wrong, or is this just how the IDL routine
works? Can I re-order them into descending order by simply sorting
them and switching the singular vectors (columns) of U & V in the
same way?

Thanks for any help

Tim

......................... Dr Tim Osborn . t.osborn@uea.ac.uk
.... ___/.. __ /.. /.. /. Senior Research Associate . phone:01603 592089
... /..... /. /.. /.. /.. Climatic Research Unit . fax: 01603 507784
.. /..... __/.. /.. /... School of Environmental Sciences.
. /..... /\ ... /.. /.... University of East Anglia .
____/.._/..\_..____/..... Norwich NR4 7TJ .
......................... UK .

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[Message index]

		SVDC in IDL 5.0 By: f055 on Wed, 17 September 1997 00:00
		Re: SVDC in IDL 5.0 By: Henry Chapman on Thu, 18 September 1997 00:00

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