[Rd] e1071: using svm with sparse matrices (PR#8527)

Kasper Daniel Hansen khansen at stat.Berkeley.EDU
Fri Jan 27 19:07:38 CET 2006

First: this is not a bug, more a feature request.

Secondly, even if it was a bug, it is _not_ a bug in R, please read  
the posting rules for bugs. Now a member of R-core has to use  
valuable time to clean up after your bug report.

Correspondence such as this such really be sent to the package  
maintainers (and - perhaps - a cc to R-devel).

Having said all of this, of course it would be nice if svn supported  
sparse matrices.


On Jan 27, 2006, at 2:02 AM, julien.gagneur at embl.de wrote:

> Full_Name: Julien Gagneur
> Version: 2.2.1
> OS: Linux (Suse 9.3)
> Submission from: (NULL) (
> Using the SparseM library (SparseM_0.66)
> and the e1071 library (e1071_1.5-12)
> I fail using svm method with a sparse matrix. Here is a sample  
> example.
> I experienced the same problem under Windows.
>> library(SparseM)
> [1] "SparseM library loaded"
>> library("e1071")
> Loading required package: class
>> data(iris)
>> attach(iris)
>> M=as.matrix(iris[,1:4])
>> Msparse=as.matrix.csr(M)
>> Species=iris[,5]
>> mod=svm(Msparse,Species)
> Error in svm.default(Msparse, Species) : object "nac" not found
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