Hi all, In looking through the docs, I see two very nice features: the .where() query method, and the tables.Expr computation mechanism. But, it doesn't appear to be possible to combine the two. It appears that, if I want to compute some function of my columns, but only for certain rows, I have two options. - I can use tables.Expr to compute the function, and then filter the results in python - I can use mytable.where() to select the rows I'm interested in, and then compute the function in python
Am I missing anything? Is it possible to perform fast out-of-core computations with numexpr, but only on a subset of the existing rows? Regards, Jon Wilson ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
