search for: compact_seq_expand

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

...ely 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. */ if (COMPACT_SEQ_EXPANDED(x) != R_NilValue) return FALSE; #endif return TRUE; } (FALSE is a macro for 0, TRUE is a macro for 1). Think of the meaning of the return value to No_NA methods as the object's answer to the following question "Are you sure there are zero NAs in your data?" When it is sure o...

...al > 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. */ > if (COMPACT_SEQ_EXPANDED(x) != R_NilValue) > return FALSE; > #endif > return TRUE; > } > > (FALSE is a macro for 0, TRUE is a macro for 1). > > Think of the meaning of the return value to No_NA methods as the object's > answer to the following question > > "Are you sure there...