block diagonal multiplication

Version 1.1.0.0 (2,27 KB) von David Holdaway
Used for multiplying large block diagonal matrices with matrices / vectors.
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Aktualisiert 26. Apr 2012

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Used to perform B*M or M*B with B a block diagonal matrix, B is stored as a cell array (call it C) with each element a matrix as a block of B, such that B = blkdiag(C{:}).
This speeds up the multiplication when B is large and also allows the operation to take place when B could not fit in the memory stored as a full block diagonal matrix.
Operations B'*M = (M'*B)' and M*B' can be performed using transpose identities

Zitieren als

David Holdaway (2024). block diagonal multiplication (https://www.mathworks.com/matlabcentral/fileexchange/35717-block-diagonal-multiplication), MATLAB Central File Exchange. Abgerufen .

Kompatibilität der MATLAB-Version
Erstellt mit R2012a
Kompatibel mit allen Versionen
Plattform-Kompatibilität
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Version Veröffentlicht Versionshinweise
1.1.0.0

Modified the program to give an error rather than a warning when the matrix multiplication is not possible. Changed the way the program deals with sparse inputs, only converting sections to full matrices when an extra argument "tryfull" is given.

1.0.0.0