Hi, Pierre:   Thanks for the reply. I can now actually turn a big list into a record array. My question is actually how to join related record arrays in Python. This is done in SAS by MERGE and PROC SQL and by merge() in R. But I have no idea how to do it in Python.   Thanks.   Wei Su --- On Mon, 5/11/09, Pierre GM wrote: From: Pierre GM Subject: Re: [Numpy-discussion] How to merge or SQL join record arrays in Python? To: "Discussion of Numerical Python" Date: Monday, May 11, 2009, 10:03 PM On May 11, 2009, at 5:44 PM, Wei Su wrote:

Coming from SAS and R, this is probably the first thing I want to do  now that I can convert my data into record arrays. But I could not  find any clues after googling for a while. Any hint or suggestions  will be great!

That depends what you want, actually, ut this should get you started http://docs.scipy.org/doc/numpy/user/basics.rec.html Note the slight difference between a structured array (fields  accessible as items) and a recarray (fields accessible as items and  attributes). _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion