On 12 May 2016 at 09:25, Charles Determan wrote:
| Thank you Simon for the detailed reply. That explains much more of what I was
| looking for from the R side.
|
| Dirk, I'm sorry if I seem hung up on anything here but I am trying to
| understand the details. My reply about XPtr or XPtr on arma
On 12 May 2016 at 09:18, Dirk Eddelbuettel wrote:
|
| On 12 May 2016 at 13:11, Mark van der Loo wrote:
| | Charles,
| |
| | 1. Perhaps this question is better directed at the R-help or
| | R-pacakge-devel mailinglist.
| |
| | 2. It basically means that R itself can only evaluate one R expressio
Thank you Simon for the detailed reply. That explains much more of what I
was looking for from the R side.
Dirk, I'm sorry if I seem hung up on anything here but I am trying to
understand the details. My reply about XPtr or XPtr on arma/Eigen was to
confirm my understanding was correct, which it
On 12 May 2016 at 13:11, Mark van der Loo wrote:
| Charles,
|
| 1. Perhaps this question is better directed at the R-help or
| R-pacakge-devel mailinglist.
|
| 2. It basically means that R itself can only evaluate one R expression at
| the time.
|
| The parallel package circumvents this by star
The R language itself has features that limit how much
mulitthreading/parallel processing can be done. There are functions with
side effects, such as library(), plot(), runif(), <-, and <<- and there are
no mechanisms to isolate them.
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Thu, May 12,
As others said XPtr is not something in R so Rcpp mailing list would be the
right place for that aspect.
However, it you forget Rcpp and phrase it as an R question, you also get much
closer to the reason and answer. SEXP type is the internal representation of
all objects in R. I assume your que
Thanks for the replies. Regarding the answer by Dirk, I didn't feel like I
still understood the reasoning why mclapply or foreach cannot handle XPtr
objects. Instead of cluttering the SO question with comments I was getting
the impression that this was a limitation inherited with R objects (which
Charles,
1. Perhaps this question is better directed at the R-help or
R-pacakge-devel mailinglist.
2. It basically means that R itself can only evaluate one R expression at
the time.
The parallel package circumvents this by starting multiple R-sessions and
dividing workload.
Compiled code calle
On 12/05/2016 8:45 AM, Charles Determan wrote:
R Developers,
Could someone help explain what it means that R is single threaded? I am
trying to understand what is actually going on inside R when users want to
parallelize code. For example, using mclapply or foreach (with some
backend) somehow
R Developers,
Could someone help explain what it means that R is single threaded? I am
trying to understand what is actually going on inside R when users want to
parallelize code. For example, using mclapply or foreach (with some
backend) somehow allows users to benefit from multiple CPUs.
Simi
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