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

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revision 516, Sat Feb 5 13:54:20 2005 UTC revision 517, Sat Feb 5 13:54:37 2005 UTC
# Line 19  Line 19 
19    dgCMatrix objects (too tired to do that now).    dgCMatrix objects (too tired to do that now).
20    
21  - bCrosstab(): do we really want the diagonal "V:V" crosstabs?  - bCrosstab(): do we really want the diagonal "V:V" crosstabs?
22                   (if so or in any case: add to  man/bCrosstab.Rd )
23    
24  - src/Metis/ : some Makefile needs fixing, as changing src/Metis/*.c  - src/Metis/ : one of the two Makefiles needs fixing, as changing
25               does not lead to recompilation.               src/Metis/*.c  does not lead to recompilation.
26    
27  - man/Matrix.Rd :  has example with dimnames, but we just drop them!  - man/Matrix.Rd :  has example with dimnames, but we just drop them!
28                  MM thinks dimnames should be supported (but then ...)                  MM thinks dimnames should be supported (but then ...)
# Line 30  Line 31 
31          If we really want to keep them, don't use "LazyData"          If we really want to keep them, don't use "LazyData"
32          (such that one needs  data(*) explicitly);          (such that one needs  data(*) explicitly);
33          But MM would rather want something like  ex.mm and ex.y          But MM would rather want something like  ex.mm and ex.y
34    
35    - spelling style: Should "coersion" be "coercion" ?
36    
37    -------
38    
39    We have a (at least one) basic problem :
40       Currently the show() method fail sometime after coercion:
41       e.g. 'sy' show()s wrongly, even though it "str()" fine :
42    
43          (po <- crossprod(Matrix(0:3, 2))) # ok
44          (ge <- as(po, "dgeMatrix")) # ok
45          (sy <- as(po, "dsyMatrix")) # BAD
46          str(sy) # looks fine
47    
48      or
49          example(expand) # -> ex$L and ex$U look bad, however
50          as(ex$L, "dgeMatrix") # `works'
51    
52      {Of course, we don't need a workaround but must understand
53       and solve the problem}

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