[Rd] Matrix / SparseM conflict (PR#8618)

[ripley@stats.ox.ac.uk]

Both are contributed packages. The R-bugs repository is for bugs in R, not 
for contributed packages, as clearly stated in the R FAQ.

   Finally, check carefully whether the bug is with R, or a contributed
   package.  Bug reports on contributed packages should be sent first to
   the  package maintainer, and only submitted to the R-bugs repository by
   package maintainers, mentioning the package in the subject line.

Please contact the maintainers.  (It looks to me as if the problem is in 
SparseM, so you could try loading it first.)

On Mon, 20 Feb 2006, dpleydel at univ-fcomte.fr wrote:

> Full_Name: David Pleydell
> Version: 2.2.1
> OS: Debian Etch
> Submission from: (NULL) (193.55.70.206)
>
>
> There appears to be a conflict between the chol functions from the Matrix and
> the SparseM packages. chol() can only be applied to a matrix of class dspMatrix
> if SparseM is not in the path.
>
> with gratitude
> David
>
>
>> library(Matrix)
>> sm <- as(as(Matrix(diag(5) + 1), "dsyMatrix"), "dspMatrix")
>> chol(sm)
> 5 x 5 Matrix of class "pCholesky"
>     [,1]      [,2]      [,3]      [,4]      [,5]
> [1,] 1.4142136 0.7071068 0.7071068 0.7071068 0.7071068
> [2,]         . 1.2247449 0.4082483 0.4082483 0.4082483
> [3,]         .         . 1.1547005 0.2886751 0.2886751
> [4,]         .         .         . 1.1180340 0.2236068
> [5,]         .         .         .         . 1.0954451
>>
>> library(SparseM)
> [1] "SparseM library loaded"
>> chol(sm)
> Error in chol(sm) : no applicable method for "chol"
>>
>> detach("package:SparseM")
>> chol(sm)
> 5 x 5 Matrix of class "pCholesky"
>     [,1]      [,2]      [,3]      [,4]      [,5]
> [1,] 1.4142136 0.7071068 0.7071068 0.7071068 0.7071068
> [2,]         . 1.2247449 0.4082483 0.4082483 0.4082483
> [3,]         .         . 1.1547005 0.2886751 0.2886751
> [4,]         .         .         . 1.1180340 0.2236068
> [5,]         .         .         .         . 1.0954451
>>
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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