[Rd] readRDS and saveRDS

Hadley Wickham hadley at rice.edu
Tue Oct 18 22:36:48 CEST 2011

>> Ending names in .foo is a bad idea because of the S3 naming conventions, so
>> I think this is unlikely.  But you can always create an alias yourself...
> I always thought that S3 was part of the reason for read.ext write.ext. In:
> "/path/file.ext"
> the "class" of the file is "ext".  I kind of like the idea of taking
> this farther, generic functions read/write dispatch to the appropriate
> method depending on the class of the file.  Generally, only read/write
> would be used, specifying the specific method as needed.  read.rda and
> write.rda could replace load/save where: dat <- read.rda() would
> create an environment, dat rather than simply loading them into the
> global environment.
> Though this is more of a hypothetical situation than a suggestion for change.

That makes me think of a generic read that would dispatch not on the
class of the first argument (which would always be a string), but
would instead dispatch on the file extension.  So read("x.csv") would
call read.csv, read("cache.rds") would use readRDS etc. Of course it
doesn't work in complete generality, but it's a fun idea to think


Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

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