Mark Larsen wrote: > I'm taking the plunge and switching over to rpy2. While, Python to > RObjects seems straightforward, what about the reverse?
It just depends of what you want the reverse to be, I suppose. > For example, I have a R function which returns a matrix. How can I get > this into a list of lists OR loop over each column (or row) pulling the > vector one at a time? What's the most efficient way to take an RVector > to a list? Representing a matrix as a list of lists does seem to me as the most memory/speed efficient thing to do (especially since you seem concerned with efficiency for large structures). There are more adapted solutions (Numpy being one of them). > This works --> > > [i for i in robjects.FloatVector([1,2,3,4])] > > But seems inefficient for large structures. > > Finally, (i swear last question). How does rpy2 compare in terms of > speed to rpy? I have not done benchmarks. > I'm mostly interested in the conversion of data and the > initialization. When initializing R, well... most of the time it takes is used by R itself. Note that when speed matters, working out things at the rpy2.rinterface level is a good idea. Getting the help of the likes of psyco should help (although I have not found the time to try it out). L. > Thanks, > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > > > ------------------------------------------------------------------------ > > _______________________________________________ > rpy-list mailing list > rpy-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/rpy-list ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ rpy-list mailing list rpy-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rpy-list
