rs[1:3], letters[2:3], letters[1:6])
c_listlengths(l)
[1] 3 2 6
c_listlengths(l2)
[1] 3 2 6
l3=list(letters[1:6], letters[2:3], letters[1:3])
c_listlengths(l3)
[1] 6 2 3
On Thu, Jul 1, 2021 at 5:14 PM Dr Gregory Jefferis <
jeffe...@mrc-lmb.cam.ac.uk> wrote:
Dear RcppUsers,
I feel like
Dear RcppUsers,
I feel like there must be a simple way to do the equivalent of
sapply(L, length)
in Rcpp but I can't seem to get past the problem of converting the
elements of L into a type for which .size() or .length() are valid. I
see that I could do this using some long switch(TYPEOF(x))
Hello all,
I am wrapping a very simple C++ library in a package (to read wavefront
3D obj files). The results come back as a std::vector of a struct which
contains various fields using datatypes such as float, float[],
std::string. I am going to return this as a list of lists. Each of the
sub
Dear Dirk,
On 1 Sep 2014, at 21:19, Dirk Eddelbuettel wrote:
These very useful RCPP_EXPOSED_CLASS* macros are a tad
underdocumented.
Greg, would you be interested in writing up a simple Rcpp Gallery post
on that?
I would be happy to help if you'd prefer that.
Many thanks for the invitatio
Dear Romain,
On 1 Sep 2014, at 17:32, Romain Francois wrote:
This looks related to what RCPP_EXPOSED_CLASS does, perhaps because
your class comes from a template, you could try
RCPP_EXPOSED_CLASS_NODECL instead. The only difference is that it does
not add the class forward declaration, so you
On 1 Sep 2014, at 14:09, Dirk Eddelbuettel wrote:
And I think I was trying to explain to you that
- becase _R_ only knows double and
- does dispatch by _name_ only
there is no clean way in which _Rcpp_ can maintain these as two
distinct
versions under the same name. In short, just because you
Dear Dirk,
On 1 Sep 2014, at 13:22, Dirk Eddelbuettel wrote:
You need both LinkingTo: statements as they give us the -I flags
needed for
compilation.
These days you need only one Import: statement to instantiate Rcpp.
Just to be clear, the relevant part of my DESCRIPTION looks like this:
I
Dear Dirk,
Many thanks for your quick (as ever) response.
On 1 Sep 2014, at 13:27, Dirk Eddelbuettel wrote:
But in this case consider that
a) R itself only knows double so at some point both variants need to
be
promoted up
Yes, the code presently includes a static cast to the template scal
Hello,
I have a more or less complete Rcpp(Eigen) dependent package that
exposes a pair of C++ classes to R using RcppModules;the C++ classes
(which implement k nearest neighbour search trees) differ only in their
scalar storage type (float vs double) and are called WKNND and WKNNF.
For futur
Hello,
I have package that depends on Rcpp(Eigen). Originally I imported and
linked to Rcpp and RcppEigen. However sending the package to the
winbuilder server, r-devel complains that I only need to link to
RcppEigen:
* checking package dependencies ... NOTE
Package in Depends/Imports which
ce somewhere in the Rcpp
modules documentation for this.
Best,
Greg.
On 29 Aug 2014, at 16:21, Dr Gregory Jefferis wrote:
Hello,
I just wondered if someone could give me some pointers for how to
document classes exposed by Rcpp Modules / setRcppClass. I am a little
hazy on what setRcppC
Hello,
I just wondered if someone could give me some pointers for how to
document classes exposed by Rcpp Modules / setRcppClass. I am a little
hazy on what setRcppClass is doing and how I should be documenting it
and reading
http://cran.r-project.org/web/packages/Rcpp/vignettes/Rcpp
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