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[matrix] View of /pkg/TODO
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View of /pkg/TODO

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Revision 1226 - (download) (annotate)
Mon Mar 13 14:07:58 2006 UTC (13 years, 6 months ago) by maechler
File size: 3209 byte(s)
sparse: "[<-" and better arithmetic; other tweaks
   using #ifdef USE_CHOLMOD.  Some of the things to be done

   - Move documentation from subdirectories of src to inst/doc
   - Write utilities to create a cholmod_sparse pointer from a
   dgCMatrix or lgCMatrix (or zgCMatrix) object without copying and
   - Start adding simple S4 methods (rcond, %*%, +, cbind, t).

  third calls in the Synopsis should be to ldexpf and ldexpl.


- consider moving alloc3Darray from ./src/Mutils.c to


- provide methods for "dspMatrix" and "dppMatrix"!


  (have some dtr* <-> dtp*)


- combine the C functions for multiplication by special forms and
  'classed' argument.
    and for _crossprod()]

- add more comprehensive examples / tests for Schur decomposition

- arithmetic for sparse matrices:
	     <sparseMatrix>  o  <same-dim-sparseMatrix>


- Create a Harwell-Boeing version of the matrix mm and the response
  vector y in inst/external and remove them from the data directory.
  Modify any examples that use them and modify the Comparisons vignette.

   keep triangular and symmetric Matrices when appropriate:

  We currently have many of these conversions explicitly, e.g.
   setAs("dsTMatrix", "lsTMatrix",
  but I would rather want to automatically construct all these coercion
  How can one do this {in a documented way} ?

  calling Lapack's DGEMM for "dense"

- "ltTmatrix" :
  2) new("ltTMatrix", diag = "U", Dim = c(2:2, 2:2)) shows lack of ltTM*_validate

- BUGlet:  Shouldn't lose factorization here:

- "Compare" for dgC & dgT  --- want to be able to do  M[M > 10]  etc
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