[Rd] Large vector support in data.frames

[Jan van der Laan]

What is the status of supporting long vectors in data.frames (e.g. 
data.frames with more than 2^31 records)? Is this something that is 
being worked on? Is there a time line for this? Is this something I can 
contribute to?


I now regularly work with datasets with more than 2^31 records and not 
being able to use data.frames is frustrating sometimes. I tried looking 
for information on this, but I probably looked in the wrong places 
and/or used the wrong search terms, and I could not find any information 
on this.


Best,
Jan

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[Rd] non-API entry point Rf_findVarInFrame3 will be removed

[luke-tierney--- via R-devel]

The non-API entry point Rf_findVarInFrame3 used by some packages will
be removed as it is not needed in one use case and not working as
intended in the other.

The most common use case, Rf_findVarInFrame3(rho, sym, TRUE), is
equivalent to the simpler Rf_findVarInFrame(rho, sym).

The less common use case is to test for existence of a binding with

findVarInFrame(rho, sym, FALSE) != R_UnboundValue

The intent is that this have no side effects, but that is not the
case: if the binding exists and is an active binding, then its
function will be called to produce a value. This usage should be
replaced with R_existsVarInFrame(rho, sym).

R_existsVarInFrame has been marked as part of the experimental API.
It is not yet clear whether Rf_findVarInFrame will become part of an
API.  If it does, then its semantics will likely have to change; if it
does not, an alternate interface will be provided.

Best,

luke


--
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa  Phone: 319-335-3386
Department of Statistics andFax:   319-335-3017
   Actuarial Science
241 Schaeffer Hall  email:   luke-tier...@uiowa.edu
Iowa City, IA 52242 WWW:  http://www.stat.uiowa.edu

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