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subspace.m

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subspace.m

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12 Nov 1999 (Updated )

Angle between subspaces.

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Description

SUBSPACE(A,B) finds the largest angle between two subspaces specified by the columns of A and B. If A and B are vectors of unit length, this is the same as COS(ABS(A'*B)) in exact arithmetic. This is a replacement for MATLAB's SUBSPACE.m Rev. 5.5-5.8 that fails to provide correct answers for angles smaller than e-8 and for Rev. 5.9-5.10.4.3 that fails to provide correct answers for angles close to pi/2.

Acknowledgements

Subspacea.M inspired this file.

This file inspired Subspacea.M.

MATLAB release MATLAB 7.0.1 (R14SP1)
Other requirements The code does not work and is not intended for sparse data.
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Comments and Ratings (2)
28 Jul 2009 Elmi bin  
06 Jan 2008 Ma Chaojie

Good

Updates
16 Nov 2004

The comments are updated to reflect the problems of the most recent MATLAB's SUBSPACE.m code.

16 Nov 2004

The comments are updated to reflect the problems of the most recent MATLAB's SUBSPACE.m code.

16 Nov 2004

The comments are updated to reflect the problems of the most recent MATLAB's SUBSPACE.m code.

16 Nov 2004

The comments are updated to reflect the problems of the most recent MATLAB's SUBSPACE.m code.

19 May 2009

License update to free software (BSD). Comments update.

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