Diff of /pkg/TODO

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	revision 529, Mon Feb 7 10:56:34 2005 UTC	revision 881, Tue Aug 30 14:37:09 2005 UTC
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1	- Report the problem in the Linux ldexp manual page.  The second and	- Report the problem in the Linux ldexp manual page.  The second and
2	third calls in the Synopsis should be to ldexpf and ldexpl.	third calls in the Synopsis should be to ldexpf and ldexpl.
3
4	- [,] indexing	- [,] indexing: for sparse "works", but not yet for negative indices!
5
6	- group generics: "Arith", but also "Ops" and "Math";  see	- group generics: "Arith" (partly done),
7	?Math.data.frame  and the examples in	but also "Compare", "Math" etc;
8	?SetGeneric	see ?Math  and the examples in ?SetGeneric
9
10	- bCrosstab(): do we really want the diagonal "V:V" crosstabs?	- methods for rbind and cbind where they make sense
11	(if so or in any case: add to  man/bCrosstab.Rd )	(Kurt is particularly interested in dgCMatrix ones, for pkg 'arules')
12		****> UNFEASIBLE as long cbind is function(..., *) !!!! <*******
13	- src/Metis/ : one of the two Makefiles needs fixing, as changing	--> follow John's proposition  cbind(x, ...) via Generic cbind2(x,y)?
	src/Metis/*.c  does not lead to recompilation.
	--DB - it seems both Makefiles need fixing.  I think I have the
	src/Metis/Makefile fixed but not src/Makefile
14
15	- man/Matrix.Rd :  has example with dimnames, but we just drop them!	- consider moving alloc3Darray from ./src/Mutils.c to
16	MM thinks dimnames should be supported (but then ...)	$(RSRC)/src/base/array.c
17
18	- data/ : names 'mm' and even more 'y' are  ``too short''.	- data/ : names 'mm' and even more 'y' are  ``too short''.
19	If we really want to keep them, don't use "LazyData"	If we really want to keep them, don't use "LazyData"
20	(such that one needs  data(*) explicitly);	(such that one needs  data(*) explicitly);
21	But MM would rather want something like  ex.mm and ex.y	But MM would rather want something like  ex.mm and ex.y
22
23	- spelling style: Should "coersion" be "coercion" ?	-  slot "factors" maybe should move up to "Matrix"
	- "factors" maybe should move up to "Matrix"
24
25	-------	-------
26
#	Line 44	Line 39
39
40	{Of course, we don't need a workaround but must understand	{Of course, we don't need a workaround but must understand
41	and solve the problem}	and solve the problem}
42
43		---
44
45		- provide methods for "dspMatrix" and "dppMatrix"!
46
47		- implement (more) methods for supporting "packed" (symmetric / triangular)
48		matrices; particularly something like pack() and unpack()  [to/from our
49		classes from/to "numeric"] --- have already man/unpack.Rd but no method yet!
50
51		(have some dtr* <-> dtp*)
52
53		- implement diagonal Matrix class  "ddiMatrix" etc
54		using constructor function Diagonal() or Diag().
55
56		BUG: rcond() of a singular dpoMatrix gives a LaPack error instead of just 0:
57		MM <- crossprod(M <- Matrix(c(1:4,9:6), 2,4)) ; rcond(MM)
58		##> Error in rcond(MM) : Lapack routine dpotrf returned error code 4
59
60
61		---
62
63		- combine the C functions for multiplication by special forms and
64		solution wrt special forms by using a 'right' argument and a
65		'classed' argument.
66		[done with dgeMatrix_matrix_mm();  not yet for other classes;
67		and for _crossprod()]
68
69		- add more comprehensive examples / tests for Schur decomposition
70
71		- arithmetic for sparse matrices:
72		<sparseMatrix>  o  { <scalar> | <same-dim-sparseMatrix> }
73		should return a sparse matrix  for at least "+" and "*" , also %%,
74		and "/" and "%/%" at least when the RHS is non-zero a scalar.
75
76		---
77
78		- Create a Harwell-Boeing version of the matrix mm and the response
79		vector y in inst/external and remove them from the data directory.
80		Modify any examples that use them and modify the Comparisons vignette.

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