Displaying 3 results from an estimated 3 matches for "_no_na".
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2019 Sep 03
2
[ALTREP] What is the meaning of the return value of Is_sorted and No_NA function?
Hi,
I would like to figure out the meaning of the return value of these two
functions. Here are the default definitions I find from R source code:
static int altreal_Is_sorted_default(SEXP x) { return UNKNOWN_SORTEDNESS; }
static int altreal_No_NA_default(SEXP x) { return 0; }
I guess the macro *UNKNOWN_SORTEDNESS *in *Is_sorted* and 0 in *No_NA
*simply means
unknown sorted/NA status of the vector, so R will loop over the vector and
find the answer. However, what should we return in these functions to
indicate whether the vector has been so...
2019 Sep 11
0
[ALTREP] What is the meaning of the return value of Is_sorted and No_NA function?
..._NA_1ST = -2,
SORTED_DECR = -1,
UNKNOWN_SORTEDNESS = INT_MIN, /*INT_MIN is NA_INTEGER! */
SORTED_INCR = 1,
SORTED_INCR_NA_1ST = 2,
KNOWN_UNSORTED = 0};
The default value there is NA_INTEGER (ie INT_MIN), indicating that there
is no sortedness information.
Currently, *_NO_NA effectively return a boolean, (even though the actual
return value is int). This can be seen in the method we provide for compact
sequences in altclasses.c:
static int compact_intseq_No_NA(SEXP x)
{
#ifdef COMPACT_INTSEQ_MUTABLE
/* If the vector has been expanded it may have been modified. *...
2019 Sep 11
1
[ALTREP] What is the meaning of the return value of Is_sorted and No_NA function?
...UNKNOWN_SORTEDNESS = INT_MIN, /*INT_MIN is NA_INTEGER! */
> SORTED_INCR = 1,
> SORTED_INCR_NA_1ST = 2,
> KNOWN_UNSORTED = 0};
>
> The default value there is NA_INTEGER (ie INT_MIN), indicating that there
> is no sortedness information.
>
> Currently, *_NO_NA effectively return a boolean, (even though the actual
> return value is int). This can be seen in the method we provide for compact
> sequences in altclasses.c:
>
>
> static int compact_intseq_No_NA(SEXP x)
> {
> #ifdef COMPACT_INTSEQ_MUTABLE
> /* If the vector has been...