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xres
2004 Jun 30
1
AS_NUMERIC and as.numeric - Could someone explain?
...ledge on R internals).
I have four vectors a,b,c and z of size 10000 each. With these vectors I
call
.Call("hyp2f1forrey", a, b, b, z, PACKAGE = "hyp2f1")
to access
SEXP hyp2f1forrey(SEXP a, SEXP b, SEXP c, SEXP x)
{
int i,n;
double *xa, *xb, *xc, *xx, *xresr, *xresi;
SEXP resr, resi;
n = LENGTH(a);
PROTECT(a = AS_NUMERIC(a));
PROTECT(b = AS_NUMERIC(b));
PROTECT(c = AS_NUMERIC(c));
PROTECT(x = AS_NUMERIC(x));
PROTECT(resr = NEW_NUMERIC(n));
PROTECT(resi = NEW_NUMERIC(n));
xa = NUMERIC_POINTER(a);
xb = NUMERIC_POINTER(b...