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

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revision 2537, Sat May 8 15:24:53 2010 UTC revision 2538, Sat May 8 15:25:20 2010 UTC
# Line 207  Line 207 
207    line in tests/indexing.R uses very large objects unnecessarily;    line in tests/indexing.R uses very large objects unnecessarily;
208    Improve  replTmat()  in R/Tsparse.R, making use of new "abIndex"    Improve  replTmat()  in R/Tsparse.R, making use of new "abIndex"
209    vectors.    vectors.
210    
211    - {IS THIS CURRENT?}
212      Sept. 2009:
213      Subject: chol2inv() |-> solve(<CHMfactor>)
214    
215      when testing and documenting  chol2inv(),
216      I found that it's pretty simple to also define a method for
217      "CHMfactor" objects, namely simply the solve(*, Diagonal(.) "A")
218      method.
219      This is not particularly exciting, and also does *not*, I think
220      help for defining a chol2inv() method for  *sparse* (upper)
221      triangular matrices.

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