search for: my_innocent_funct

On 09. 01. 20 15:41, lille stor wrote: > I believe this could be done without creating side effects (e.g. > crash) as we are just talking about changing values. that is exactly the issue that my last two points warn about. Example: a <- mtcars .Call("my_innocent_function", a) Would you expect that mtcars data.frame would be altered after this code is executed? What if some existing code relies on mtcars always containing the same data, which is a perfectly valid assumption given R specification. If what you are trying to do is to have mutable data fram...

Hello, I would like for my C function to be able to manipulate some values stored in an R data frame. To achieve this, a need the (real) memory address where the R data frame stores its data (hopefully in a contiguous way). Then, from R, I call the C function and passing this memory address as a parameter. The question: how can we get the memory address of the R data frame? Thank you! L.