A Thursday 03 February 2011 15:01:28 Bartosz Telenczuk escrigué: > > Uh, no. tables.Expr only supports simple element-wise operations > > whose output has the same shape than operands (so `nonzero` is not > > supported). Also, it cannot carry out operations that makes use of > > different indices in operands for computing some element (so > > `diff` is be supported either). Rather, you need to think about > > tables.Expr (and numexpr in general) as a virtual machine that > > only accepts vectors (matrices) and can perform operations only > > among elements in the same positions (mostly like a SIMD > > processor). > > Now I got it. Thanks. Would you recommend to use the same chunk > approach as for data copy above to perform the "on-disk" threshold > detection?
Yes, definitely. -- Francesc Alted ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
