Displaying 2 results from an estimated 2 matches for "coercefunc".
2020 Nov 21
3
Two ALTREP questions
..., or adding attributes, is a common need for the object
operation, I wonder if this missing feature is intended? This also brings
my second question, it seems like the ALTREP coercion function does not
handle attributes correctly. After the coercion, the ALTREP object will
lose its attributes.
```
coerceFunc <- inline::cxxfunction( signature(x = "SEXP", attr = "SEXP" ) , '
SET_ATTRIB(x,attr);
return(Rf_coerceVector(x, REALSXP));
')
> coerceFunc(1:6, pairlist(dim = c(2L, 3L)))
[1] 1 2 3 4 5 6
> coerceFunc(1:6 + 0L, pairlist(dim = c(2L, 3L)))
[,1] [,2] [,3]
[1,]...
2020 Nov 21
0
[External] Two ALTREP questions
...with larger vectors; try variants
of your examples for more than 64 elements.
> This also brings
> my second question, it seems like the ALTREP coercion function does not
> handle attributes correctly. After the coercion, the ALTREP object will
> lose its attributes.
> ```
> coerceFunc <- inline::cxxfunction( signature(x = "SEXP", attr = "SEXP" ) , '
> SET_ATTRIB(x,attr);
> return(Rf_coerceVector(x, REALSXP));
> ')
>> coerceFunc(1:6, pairlist(dim = c(2L, 3L)))
> [1] 1 2 3 4 5 6
>> coerceFunc(1:6 + 0L, pairlist(dim = c(2L, 3L)...