search for: sorted_decr

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 any...

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, *...

...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 n...