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[matrix] Diff of /pkg/Matrix/TODO
Diff of /pkg/Matrix/TODO
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116 
and even more so for, e.g. <sparse> %*% <dense> 
and even more so for, e.g. <sparse> %*% <dense> 
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{used in Soeren's 'gR' computations}, 
{used in Soeren's 'gR' computations}, 
118 
we should also provide a generic and methods. 
we should also provide a generic and methods. 
119 

 diag(A %*% B) might look like a "generalization" of tr(A %*% B), 
120 

but as the above tricks show, is not really. 
121 

Still, it's well worth to provide diag.prod(A, B) 
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123 
 qr.R(qr(x)) may differ for the "same" matrix, depending on it being 
 qr.R(qr(x)) may differ for the "same" matrix, depending on it being 
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sparse or dense: 
sparse or dense: 

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Removed from v.2617 

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Added in v.2618 

