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[matrix] Diff of /pkg/TODO
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Diff of /pkg/TODO

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revision 1845, Wed May 16 21:24:41 2007 UTC revision 1887, Thu Jun 7 09:04:34 2007 UTC
# Line 141  Line 141 
141  - ! <symmetricMatrix>  loses symmetry, both for dense and sparse matrices.  - ! <symmetricMatrix>  loses symmetry, both for dense and sparse matrices.
142    !M  where M is "sparseMatrix", currently always gives dense. This only    !M  where M is "sparseMatrix", currently always gives dense. This only
143    makes sense when M is ``really sparse''.    makes sense when M is ``really sparse''.
144    
145    - column names of sparse matrices are not printed;
146      we now "mention" them (if they are non-empty).
147      Option:
148            build show( <sparseMatrix>) on a function, possibly
149            print.sparseMatrix(), which gets an argument such as
150            'col.names.show  = FALSE' which is documented and can be set to TRUE
151    
152    - 'arules' needs fast colSums() and rowSums() - for ngCMatrix;
153      do it for "nMatrix" and "lMatrix" and return *integer*

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