Dear R-developers,
Using .Call I pass a S4 class with e.g. the following class definition:
setClass("mmatrix",representation(
data="matrix")
)
On the "C side" i do
mat = GET_SLOT(vs,install("data"));
and then:
printf("%f\n",NUMERIC_POINTER(mat)[1]);
The above print statement produces the correct output if
xx<- new("mmatrix")
[EMAIL PROTECTED]<-matrix(1:12+0.1,3,4). (data is double)
However it prints
0.0000
if [EMAIL PROTECTED] are integers ( [EMAIL PROTECTED]<-matrix(1:12,3,4) ).
Can anyone explain it to me why?
I thought that NUMERIC_POINTER makes it clear that i expect datatype numeric.
(Why otherwise the distinction with INTEGER_POINTER)
cheers
Eryk
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