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

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revision 2102, Fri Jan 11 22:35:25 2008 UTC revision 2103, Fri Jan 11 22:39:21 2008 UTC
# Line 175  Line 175 
175    and even more so for, e.g.  <sparse> %*% <dense>    and even more so for, e.g.  <sparse> %*% <dense>
176    {used in Soeren's 'gR' computations},    {used in Soeren's 'gR' computations},
177    we should also provide a generic and methods.    we should also provide a generic and methods.
178    
179    - qr.R(qr(x)) may differ for the "same" matrix, depending on it being
180      sparse or dense:
181        "qr.R(<sparse>) may differ from qr.R(<dense>) because of permutations"
182    
183      This is not really acceptable and currently influences  rcond() as well.

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