Thanks Doug, I made an example illustrating this for the Rcpp gallery - AND I forgot to acknowledge you in the example. That was a mistake - sorry!
Regards Søren From: dmba...@gmail.com [mailto:dmba...@gmail.com] On Behalf Of Douglas Bates Sent: 19. januar 2013 16:58 To: Dirk Eddelbuettel Cc: Søren Højsgaard; rcpp-devel@lists.r-forge.r-project.org Subject: Re: [Rcpp-devel] RcppEigen: Getting and setting dimnames of sparse matrix On Sat, Jan 19, 2013 at 10:38 AM, Douglas Bates <ba...@stat.wisc.edu<mailto:ba...@stat.wisc.edu>> wrote: On thinking about this a bit more, the dimnames should be cloned before being assigned, otherwise you end up with two references to the same storage. And once you try to clone you get into the SlotProxy area where you need to know what you are cloning. One way of doing this is shown in the enclosed. An alternative is Xout.slot("Dimnames") = clone(as<SEXP>((Xin.slot("Dimnames"))));
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