system info below. maybe it's internal to R:
> a = 1:199999999 > sum(a) [1] NA Warning message: In sum(a) : Integer overflow - use sum(as.numeric(.)) > sum(as.numeric(a)) Error: cannot allocate vector of size 1.5 Gb > but this works in a new session: > a = vector(length=199999999, mode="numeric") > sum(a) [1] 0 > ############################################### Python 2.6.6 (r266:84292, Sep 15 2010, 15:52:39) [GCC 4.4.5] on linux2 R version 2.12.1 (2010-12-16) Copyright (C) 2010 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Linux latitude 2.6.35-27-generic-pae #48-Ubuntu SMP Tue Feb 22 21:46:58 UTC 2011 i686 GNU/Linux $ hg branch; hg identify version_2.2.x 97d788ba27f8+ (version_2.2.x) tip On Tue, Mar 15, 2011 at 1:03 PM, Laurent Gautier <lgaut...@gmail.com> wrote: > On 3/15/11 5:45 PM, Brent Pedersen wrote: >> >> On Tue, Mar 15, 2011 at 9:40 AM, Laurent Gautier<lgaut...@gmail.com> >> wrote: >>> >>> It can do either one of the two. >>> >>> >>> http://rpy.sourceforge.net/rpy2/doc-dev/html/numpy.html?#low-level-interface >>> >>> >>> >>> L. >>> >> >> how about in this case?:: >> >> >> import numpy as np >> import rpy2.robjects as robjects >> import rpy2.robjects.numpy2ri >> R = robjects.r >> >> a = np.arange(199999999) >> R.sum(a) >> >> it seems to always make a copy, even if i have it in column order. > > It shouldn't be the case, I think. Any details about the Python/numpy/rpy2 > versions ? > > ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ rpy-list mailing list rpy-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rpy-list
