Displaying 2 results from an estimated 2 matches for "lengthfunc".
2019 Jul 18
0
ALTREP wrappers and factors
...e and the package is
able to define an ALTREP in pure R level, it is capable to add an attribute
to ALTREP object when creating the object and has a correct reference
number. The simplest example would be
*CODE*
```
library(AltWrapper)
inspectFunc <- function(x) cat("Altrep object\n")
lengthFunc <- function(x) return(length(x))
getPtrFunc <- function(x, writeable) return(x)
setAltClass(className = "test", classType = "real")
setAltMethod(className = "test", inspect = inspectFunc)
setAltMethod(className = "test", getLength = lengthFunc)
setAltM...
2019 Jul 17
2
ALTREP wrappers and factors
Hello,
I?m experimenting with ALTREP and was wondering if there is a preferred way to create an ALTREP wrapper vector without using .Internal(wrap_meta(?)), which R CMD check doesn?t like since it uses an .Internal() function.
I was trying to create a factor that used an ALTREP integer, but attempting to set the class and levels attributes always ended up duplicating and materializing the