Hi All,
I am confused by a type conversion happening against my intent.
In an R script I allocate a matrix X, and I pass it to a C function
by using
tmp -< .C(..., as.double(X),...).
I use as.double() because I read that it makes sure that the
parameter passing is correct.
I return the matrix from the R script using:
return (list(..., X = tmp$X, ...))
The returned value is not a matrix but a flat vector.
I must not understand something fundamental that is happening
here.
Should I remove the as.double() from the .C() call?
Here is what I am trying to do: allocate a matrix (with doubles)
that is modified by the .C() call and return it from the script.
I am also not sure how to make sure that the allocated matrix
is made up of double values. If I use diag(n) to initialize
it will that do the trick?
Thanks!
-Matyas
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