search for: sorted_decr_na_1st

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

Hi, I've found the answers to my questions: 1. For sort function, here are some macros defined in Rinternal.h: /* ALTREP sorting support */ enum {SORTED_DECR_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 macro names are pretty self-explanatory. The current implementation only supports the ascending sort. 2. For anyNA, it...

Hi Jiefei, The meanings of the return values for sortedness can be found in RInternals.h, and are as follows: /* ALTREP sorting support */ enum {SORTED_DECR_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...

...e by doing that. Best, Jiefei On Wed, Sep 11, 2019 at 1:58 PM Gabriel Becker <gabembecker at gmail.com> wrote: > Hi Jiefei, > > The meanings of the return values for sortedness can be found in > RInternals.h, and are as follows: > > /* ALTREP sorting support */ > enum {SORTED_DECR_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 sorte...