Displaying 3 results from an estimated 3 matches for "stringfromr".
2003 Feb 02
1
printing reals from C with digits -- once more
...to find something more R-ish.
PrintValue() seems promising (it understands when I change
options(digits) but I did not get it to print a single value. I tried
SEXP variable;
PrintValue(VECTOR_ELT(variable, i));
which lead to crash, while
PrintValue(variable);
prints the whole vector.
StringFromReal() (and printing as CHAR) is otherwise nice but I dont
know how can I make it to understand options(digits).
Can anybody suggest me a way for this?
Best wishes,
Ott
BTW, can I be sure that everything defined in /usr/lib/R/include and
R_ext are (more or less) safe to use?
| From: Prof Bri...
2003 Jan 29
1
printing reals from C with digits
Hi,
I want to print real numbers in C code with different values for
digits. How to do that?
As I have understood, what I should do is to call
StringFromReal()
which calls FormatReal(), that one suggests the parameters (width,
decimal places and exponential form). FormatReal() includes
eps = pow(10.0, -(double)R_print.digits);
So I guess I have to change the value of R_print.digits.
R_print.digits is defined in include/Print.h in the package...
2009 May 23
2
as.numeric(levels(factor(x))) may be a decreasing sequence
...= '9') {
+ if (*(p++) != '0') {
+ replace = (char *) p;
+ }
+ }
+ while (*(replace++) = *(p++)) {
+ ;
+ }
+ break;
+ }
+ }
+ return s;
+}
+
SEXP attribute_hidden StringFromReal(double x, int *warn)
{
int w, d, e;
formatReal(&x, 1, &w, &d, &e, 0);
if (ISNA(x)) return NA_STRING;
- else return mkChar(EncodeReal(x, w, d, e, OutDec));
+ else return mkChar(elim_trailing(EncodeReal(x, w, d, e, OutDec), OutDec));
}
SEXP attribute_hidde...