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
printing it) thus changing the array's address?
Thank you once more!
Sent: Sunday, November 12, 2017 at 6:02 PM
From: "David Winsemius"
To: "lille stor"
Cc: r-devel@r-project.org
Subject: Re: [Rd] Array changing address unexpectedly
> On Nov 12, 2017, at 8:47 A
Hi,
Given the following R code:
library(pryr)
data <- array(dim = c(5))
for(x in 1:5)
{
data[x] <- as.integer(x * 2)
}
add = address(data) # save address of "data"
for(x in 1:5)
{
data[x] <- as.integer(0)
}
if (add == addr
Hi,
To get the memory address of where the value of variable "x" (of datatype
"numeric") is stored one does the following in R (in 32 bit):
library(pryr)
x <- 1024
addr <- as.numeric(address(x)) + 24 # 24 is needed to jump the
variable info and point to the data itself (i
Hi,
I am trying to build R using Visual Studio 2010 but without success. My
question is if it possible build R with this compiler anyway?
If not, could someone please tell how to link one's C code against both the
static and shared libraries of R for Windows (that comes from the official
web
Hi,
I would like to know if the Garbage Collector (GC) changes the address of a
variable in R. In other words, assuming the following code:
library(pryr)
x <- 1:1024
addr <- address(x) # save address of variable "x" in "addr"
.
.
