3.5 | 2 ratings Rate this file 10 downloads (last 30 days) File Size: 2.66 KB File ID: #54

subspace.m

12 Nov 1999 (Updated 19 May 2009)

Angle between subspaces.

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	The author wishes to acknowledge the following in the creation of this submission: subspacea.m This submission has inspired the following: subspacea.m
MATLAB release	MATLAB 7.0.1 (R14SP1)
Other requirements	The code does not work and is not intended for sparse data.
Zip File Content
Other Files	license.txt, subspace.m

Tags for This File
Everyone's Tags	angle, linear algebra, mathematics, subspace, subspaces
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Comments and Ratings (2)
06 Jan 2008	Ma Chaojie	Good
28 Jul 2009	Elmi bin

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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.

Tag Activity for this File
Tag	Applied By	Date/Time
linear algebra	Andrew Knyazev	22 Oct 2008 06:31:06
subspace	Andrew Knyazev	22 Oct 2008 06:31:06
angle	Andrew Knyazev	22 Oct 2008 06:31:06
subspaces	Andrew Knyazev	22 Oct 2008 06:31:06
mathematics	Andrew Knyazev	22 Oct 2008 06:31:06

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