Displaying 5 results from an estimated 5 matches for "cdar".
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2019 Nov 04
2
Questions on the R C API
Hi All,
I have some questions regarding the R C API.
Let's assume I have a function which is defined as follows:
R file:
myfunc <- function(a, b, ...) .External(Cfun, a, b, ...)
C file:
SEXP Cfun(SEXP args) {
args = CDR(args);
SEXP a = CAR(args); args = CDR(args);
SEXP b = CAR(args); args = CDR(args);
/* continue to do something with remaining arguments in "..."
2010 Nov 07
1
High Frequency Trading
Hi R users,
Thanks in advance.
I am using R 2.12.0 on Windows XP.
My objective is to construct algorithms for High Frequency Trading.
May I request you to provide me information such as packages or tools please.
Thank you very much for the time you have given.
Regards,
Deb
[[alternative HTML version deleted]]
2011 Jun 19
2
windows displacement after changing screen resolution
Does anybody experienced that after exiting a program and when the screen resolution is back to normal, all windows are moved to first workspace?
2019 Nov 04
0
Questions on the R C API
...there is no simple way to locate an
element in a pairlist. As for as I know, R defines a set of
convenient functions for you to access a limited number of elements. See
below
```
#define CAR(e) ((e)->u.listsxp.carval)
#define CDR(e) ((e)->u.listsxp.cdrval)
#define CAAR(e) CAR(CAR(e))
#define CDAR(e) CDR(CAR(e))
#define CADR(e) CAR(CDR(e))
#define CDDR(e) CDR(CDR(e))
#define CDDDR(e) CDR(CDR(CDR(e)))
#define CADDR(e) CAR(CDR(CDR(e)))
#define CADDDR(e) CAR(CDR(CDR(CDR(e))))
#define CAD4R(e) CAR(CDR(CDR(CDR(CDR(e)))))
```
You can use them to get first a few arguments from a pairlist. Another...
2019 Nov 05
1
Questions on the R C API
...ment in a pairlist. As for as I know, R defines a set of
> convenient functions for you to access a limited number of elements. See
> below
>
> ```
> #define CAR(e) ((e)->u.listsxp.carval)
> #define CDR(e) ((e)->u.listsxp.cdrval)
> #define CAAR(e) CAR(CAR(e))
> #define CDAR(e) CDR(CAR(e))
> #define CADR(e) CAR(CDR(e))
> #define CDDR(e) CDR(CDR(e))
> #define CDDDR(e) CDR(CDR(CDR(e)))
> #define CADDR(e) CAR(CDR(CDR(e)))
> #define CADDDR(e) CAR(CDR(CDR(CDR(e))))
> #define CAD4R(e) CAR(CDR(CDR(CDR(CDR(e)))))
> ```
>
> You can use them to get fir...