On 7 August 2012 at 14:43, Stephen J. Barr wrote:
| Thanks for the pointer to sugar.
|
| I was just trying to think of a simple example. So my C++ code will be
| essentially:
|
| int main() {
|
| RInside R(argc, argv); // create an embedded R instance
| R.parseEval("X = gener
Also note that "just" getting random numbers is taken care of via Rcpp sugar
which wraps rnorm() etc:
R> library(inline)
R>
R> R> f <- cxxfunction(signature(), plugin="Rcpp", body='
+Rcpp::RNGScope tmp;
+return rnorm(3);
+ ')
R>
R> set.seed(42)
R> rnorm(3) ## usin
Hello again,
I am just trying to straighten this out. Say I want to have the exact same
random matrix in C++ as I do in R using rnorm. Is what I am doing below on
the right track?
Thanks,
Stephen
//
// Stephen J. Barr
// - trying to combine RInside and Eigen
#include
#include
using namesp
Ah, that made it click. Thank you so much for the help.
On Tue, Aug 7, 2012 at 2:56 PM, Dirk Eddelbuettel wrote:
>
> On 7 August 2012 at 14:43, Stephen J. Barr wrote:
> | Thanks for the pointer to sugar.
> |
> | I was just trying to think of a simple example. So my C++ code will be
> | essential
Thanks for the pointer to sugar.
I was just trying to think of a simple example. So my C++ code will be
essentially:
int main() {
RInside R(argc, argv); // create an embedded R instance
R.parseEval("X = generateSomeMatrix()");
Eigen::MatrixXd Xeigen;
// this is the par
Ah, I see the error. Please disregard this. I see how Rcpp::as works now.
Best,
Stephen
On Tue, Aug 7, 2012 at 2:08 PM, Stephen J. Barr wrote:
> Hello again,
>
> I am just trying to straighten this out. Say I want to have the exact same
> random matrix in C++ as I do in R using rnorm. Is what I
Thank you Dirk and also Douglas. This definitely helps. I think I can get
this going. Thank you so much for the quick replies.
Best,
Stephen
On Tue, Aug 7, 2012 at 11:29 AM, Dirk Eddelbuettel wrote:
>
> Hi Stephen,
>
> On 7 August 2012 at 10:55, Stephen J. Barr wrote:
> | Greetings,
> |
> | I a
Hi Stephen,
On 7 August 2012 at 10:55, Stephen J. Barr wrote:
| Greetings,
|
| I am new to Rcpp, RInside and the entire family of related packages. I am
| experienced with R and also C++ using Eigen but I have never combined the two
| before.
You are in a good starting position.
| I would like
Probably the best place to start with RcppEigen is the vignette that
Dirk and I wrote for the RcppEigen package. I can email you a copy of
the PDF file off-list if you wish.
With RcppEigen you can skip the creation of an Rcpp::NumericMatrix
object if you wish and go directly to a mapped Eigen Mat
Greetings,
I am new to Rcpp, RInside and the entire family of related packages. I am
experienced with R and also C++ using Eigen but I have never combined the
two before. I would like to create a matrix using R and then play with it
using Eigen. From what I have read so far, it seems like I can us
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