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subspace.m

subspace(A,B) SUBSPACE Angle between subspaces.
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3.5 | 2 ratings Rate this file 2 Downloads (last 30 days) File Size: 2.66 KB File ID: #54

subspace.m

by Andrew Knyazev

12 Nov 1999 (Updated 19 May 2009)

Angle between subspaces.

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File Information
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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Everyone's Tags	angle(2), jyf, linear algebra, mathematics, subspace, subspaces
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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.
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.