search for: costruction

Classes like activerecord, etc contains strange elements like ''belongs_to :something'', ''has_many :smth'' etc.. what is it? I can''t find them in ruby lang documentation.. it''s similar to ''attr_accessor'' and other costructions, how I can create my own constructions and how I must understand them? Could anyone give me some links where I can read about it?

....2 34 32 29 27 28 My question: is there a simple way to get the proper result (modify the dataset or modify the function)? RTFM responses are welcomed. My (humble?) opinion: Neither Pinheiro-Bates (2000) nor online documentation, report the need for a particular row order in the costruction of grouped data objects, and i think it should be better do not rely on it. Or, at least, to document it somewhere. I want to thank the R-core team and the entire R community for this amazingly efficient and versatile software, and i am very proud that the (not only) statistical state-of-the-art...

Dear listers, As an exercise, I am trying to fit a logistic model with nlme. Blue tit pulli (youngs) were weighted occasionnally (for field reasons) along time in 17 nestboxes. Individuals where not idenfied but their age was known. This means that for a given age several measurements were done but individuals could not be identified from a time to the other. This makes repeated values for

Which consumer-priced 1.5TB drives do people currently recommend? I had zero read/write/checksum errors so far in 2 years with my trusty old Western Digital WD7500AAKS drives, but now I want to upgrade to a new set of drives that are big, reliable and cheap. As of Jan 2010 it seems the price sweet spot is the 1.5TB drives. As I had a lot of success with Western Digital drives I thought I would