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

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revision 712, Fri May 6 22:20:59 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" (partly done),  - group generics: "Arith" (partly done),
7    but also "Compare", "Math" etc;    but also "Compare", "Math" etc;
8    see ?Math  and the examples in ?SetGeneric    see ?Math  and the examples in ?SetGeneric
9    
10  - methods for rbind and cbind where they make sense  - methods for rbind and cbind where they make sense
11      (Kurt is particularly interested in dgCMatrix ones, for pkg 'arules')
12      ****> UNFEASIBLE as long cbind is function(..., *) !!!! <*******
13        --> follow John's proposition  cbind(x, ...) via Generic cbind2(x,y)?
14    
15  - consider moving alloc3Darray from ./src/Mutils.c to  - consider moving alloc3Darray from ./src/Mutils.c to
16    $(RSRC)/src/base/array.c    $(RSRC)/src/base/array.c
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48    matrices; particularly something like pack() and unpack()  [to/from our    matrices; particularly something like pack() and unpack()  [to/from our
49    classes from/to "numeric"] --- have already man/unpack.Rd but no method yet!    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  - implement diagonal Matrix class  "ddiMatrix" etc
54    using constructor function Diagonal() or Diag().    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  - combine the C functions for multiplication by special forms and
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75    
76  ---  ---
77    
78  - in lmer.c check all instances of the use of ZtX and XtX and change  - Create a Harwell-Boeing version of the matrix mm and the response
79    them so that having a negative last element of nc means use the    vector y in inst/external and remove them from the data directory.
80    response only (but look for it in the right place).    Modify any examples that use them and modify the Comparisons vignette.

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