[Rd] pmax and long vector
Kasper Daniel Hansen
k@@perd@n|e|h@n@en @end|ng |rom gm@||@com
Tue Jan 22 03:51:55 CET 2019
Gabe, I don't (yet) know much about long vectors at the C level. So feel
free to address this.
Duncan, I'll see what I can do regarding systematically compiling a list of
functions without long vector support. These days I frequently work with
big enough matrices that I need it.
On Mon, Jan 21, 2019 at 3:09 PM Gabriel Becker <gabembecker using gmail.com>
> If you're not interested or dont have time to create said patch yourself
> let me know and i can do it.
> On Mon, Jan 21, 2019, 11:36 AM Duncan Murdoch <murdoch.duncan using gmail.com
>> On 21/01/2019 12:35 p.m., Kasper Daniel Hansen wrote:
>> > I see that base::pmax() does not support long vectors.
>> > Is R-devel interested in reports like this; ie. is there a goal of full
>> > support for long vectors in "basic" functions, something I at least
>> > greatly appreciate?
>> > MRE:
>> >> pmax(rep(1L, 3*10^9), 0)
>> > Error in pmax(rep(1L, 3 * 10^9), 0) :
>> > long vectors not supported yet:
>> > ../../../R-devel-src/src/include/Rinlinedfuns.h:522
>> I think a carefully tested patch that fixes pmax (it would need to
>> change this call from length() to xlength(), and make some other
>> necessary changes that follow from this), would probably be useful to R
>> Core, and could be posted to bugs.r-project.org.
>> It might also be useful on R-devel to post a list of all known commonly
>> used functions that don't support long vectors; this could be updated on
>> a regular basis. This might encourage people to produce patches as above.
>> I'm not so sure a report about a single function won't just get lost.
>> Duncan Murdoch
>> R-devel using r-project.org mailing list
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