read/write data in libsvm format

How do I read/write libsvm data into/from R?

The libsvm format is sparse data like

<class/target>[ <attribute number>:<attribute value>]*

e.g.,

1 10:3.4 123:0.5 34567:0.231
0.2 22:1 456:03

The "foreign" library does not seem to provide the necessary functionality.

Any suggestions? Code?

Thanks!

http://stackoverflow.com/questions/12112558/r-read-write-data-in-libsvm-format

Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000
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