[R] Java parser for R data file?
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Dec 5 18:15:31 CET 2007
On Wed, 5 Dec 2007, David Coppit wrote:
> Hi everyone,
> Has anyone written a parser in Java for either the ASCII or binary format
> produced by save()? I need to parse a single large 2D array that is
> structured like this:
> "32609_1" = c(-9549.39231289146, -9574.07159324482, ... ),
> "32610_2" = c(-6369.12526971635, -6403.99620977124, ... ),
> "32618_2" = c(-2138.29095689061, -2057.9229403233, ... ),
> Or, given that I'm dealing with just a single array, would it be better to
> roll my own I/O using write.table or write.matrix from the MASS package?
It would be much easier. The save() format is far more complex than you
need. However, I would use writeBin() to write a binary file and read
that in in Java, avoiding the binary -> ASCII -> binary conversion.
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)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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