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Revision 645 - (download) (annotate)
Tue Mar 15 00:51:42 2005 UTC (14 years, 6 months ago) by bates
File size: 1910 byte(s)
Updates
- Report the problem in the Linux ldexp manual page.  The second and
  third calls in the Synopsis should be to ldexpf and ldexpl.

- [,] indexing

- group generics: "Arith" (partly done),
  but also "Compare", "Math" etc;
  see ?Math  and the examples in ?SetGeneric

- methods for rbind and cbind where they make sense

- consider moving alloc3Darray from ./src/Mutils.c to
  $(RSRC)/src/base/array.c

- data/ : names 'mm' and even more 'y' are  ``too short''.
	If we really want to keep them, don't use "LazyData"
	(such that one needs  data(*) explicitly);
	But MM would rather want something like  ex.mm and ex.y

-  slot "factors" maybe should move up to "Matrix"

-------

We have a (at least one) basic problem :
   Currently the show() method fail sometime after coercion:
   e.g. 'sy' show()s wrongly, even though it "str()" fine :

      (po <- crossprod(Matrix(0:3, 2))) # ok
      (ge <- as(po, "dgeMatrix")) # ok
      (sy <- as(po, "dsyMatrix")) # BAD
      str(sy) # looks fine

  or
      example(expand) # -> ex$L and ex$U look bad, however
      as(ex$L, "dgeMatrix") # `works'

  {Of course, we don't need a workaround but must understand
   and solve the problem}

---

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

- implement (more) methods for supporting "packed" (symmetric / triangular)
  matrices; particularly something like pack() and unpack()  [to/from our
  classes from/to "numeric"] --- have already man/unpack.Rd but no method yet!

- implement diagonal Matrix class  "ddiMatrix" etc
  using constructor function Diagonal() or Diag().

---

- create a class of permutation matrices for use in expand.  The
  current expand method for the LU factorization is not complete
  because it does not provide the permutation.

- combine the C functions for multiplication by special forms and
  solution wrt special forms by using a 'right' argument and a
  'classed' argument.

root@r-forge.r-project.org
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