search for: duplicateex

...5 [2,] 2 4 6 ``` The problem is that the coercion function is directly dispatched to the user-defined ALTREP coercion function, so the user is responsible to attach the attributes after the coercion. If he forgets to do so, then the result is a plain vector. Similar to the `Duplicate` and `DuplicateEX` functions where the former one will attach the attributes by default, I feel that the `Coerce` function should only return a plain vector and there should be a `CoerceEx` function to do the attribute assignment, so the logic in the no-EX ALTREP functions can be consistent. I do not know how dramas...

...; ``` > The problem is that the coercion function is directly dispatched to the > user-defined ALTREP coercion function, so the user is responsible to attach > the attributes after the coercion. If he forgets to do so, then the result > is a plain vector. Similar to the `Duplicate` and `DuplicateEX` functions > where the former one will attach the attributes by default, I feel that the > `Coerce` function should only return a plain vector and there should be a > `CoerceEx` function to do the attribute assignment, so the logic in the > no-EX ALTREP functions can be consistent. I do...

...gt; defined. The default methods in altrep.c should do the right think. > > A reasonable name for the abstract class would be 'altlist'. > > 'altrep' methods that a class can provide: > > Unserialize or UnserializeEX > Serialized_state > Duplicate or DuplicateEx > Coerce > Inspect > Length > > 'altvec' methods a class should provide: > > Extract_subset > not Dataptr > not Dataptr_or_null > > 'altlist' specific methods: > > Elt > Set_elt > > Best, > > luke > &gt...

...r_or_null methods were not allowed to be defined. The default methods in altrep.c should do the right think. A reasonable name for the abstract class would be 'altlist'. 'altrep' methods that a class can provide: Unserialize or UnserializeEX Serialized_state Duplicate or DuplicateEx Coerce Inspect Length 'altvec' methods a class should provide: Extract_subset not Dataptr not Dataptr_or_null 'altlist' specific methods: Elt Set_elt Best, luke On Tue, 23 Jul 2019, Gabriel Becker wrote: > Hi Kylie, > > Is it a list with only...

Hi Kylie, Is it a list with only numerics in it? (I only see REALSXPs there, but obviously inspect isn't showing all of them). If so, you could load it up into one big vector and then also keep partitioning information around. Bioconductor does this (see ?IRanges::CompressedList ). The potential benefit here being that the underlying large vector could then be a big out-of-memory altrep. How