Displaying 3 results from an estimated 3 matches for "adim".
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2003 Jun 23
3
FW: S4 classes, creating in C
...s example
in his lecture notes on
<http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Tutorials/RExtensions/slide
s.pdf>
http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Tutorials/RExtensions/slides
.pdf
e.g.
SEXP La_DGE_dc(SEXP A)
{
SEXP aa = PROTECT(duplicate(A));
SEXP adims, pivot, val;
int m, n, info;
if (!isMatrix(aa) || !isReal(aa)) {
error("A must be a double precision matrix");
}
adims = GET_DIM(aa); m = INTEGER(adims)[0]; n = INTEGER(adims)[1];
pivot = PROTECT(NEW_INTEGER(m <...
2008 Apr 10
1
Computing time when calling C functions - why does an extra function call induce such an overhead?
...ip the call to mysolve2) then the computations take only 0.03 secs. Can anyone tell me why there is such a "time-overhead" in introducing the extra function call to mysolve2?
I am on windows XP using R 2.6.1
Best regards
S?ren
SEXP mysolve1(SEXP Ain, SEXP Bin, SEXP tolin)
{
int *Adims, *Bdims;
double tol = asReal(tolin);
SEXP A, B;
PROTECT(A = duplicate(Ain));
PROTECT(B = duplicate(Bin));
Adims = INTEGER(coerceVector(getAttrib(A, R_DimSymbol), INTSXP));
Bdims = INTEGER(coerceVector(getAttrib(B, R_DimSymbol), INTSXP));
int nrA, ncB;
double *Ap, *Bp;
nrA =...
2006 Jun 21
11
executive: "is rails secure?"
Yesterday, I was doing a dog-and-pony for the head of the company that
I work for.
He asked, "Is this (a rails application) secure?"
I said, "It''s as secure as anything else on the web is," and proceeded
to talk about how the data was protected, how we weren''t saving
anything that''s worth protecting, and so on.
I''d like to have a better