block diagonal multiplication

バージョン 1.1.0.0 (2.27 KB) 作成者: David Holdaway
Used for multiplying large block diagonal matrices with matrices / vectors.
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更新 2012/4/26

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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

引用

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

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バージョン 公開済み リリース ノート
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