On 26 November 2012 at 12:41, Davor Cubranic wrote: | On 2012-11-23, at 1:36 PM, Robert A'gata wrote: | | > Inside onEventA, I'd like to be able to create a blank data.frame or | > list with zero length vector. Once my data frame or list object is | > constructed, I'd like to append a new row to it each time onEventB is | > invoked. How can I achieve this in Rcpp? Thank you. | | Can you possibly stay in STL and keep rows in std::list, and only construct a Rcpp::DataFrame before you return to R?
Seconded -- meant to reply as well and got side-tracked. That's why I once did to gather data from a tick data plant. I just grew everything (on callbacks from the ticker database system) in a stateful C++ class, and then transformed into Rcpp types before returning the query to R. I knew how many columns I'd get at the beginning of the result set, and could then grew them as results came in. Was a nice solution and better than what the vendor offered via ODBC :) Dirk -- Dirk Eddelbuettel | [email protected] | http://dirk.eddelbuettel.com _______________________________________________ Rcpp-devel mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
