search for: costruct

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-a...

...ven age several measurements were done but individuals could not be identified from a time to the other. This makes repeated values for a given age group in each nestbox. The aim is to get an acceptable growth curve (weight against age). As far as repeated values cannot be handled with standard coStruct classes of nlme, I have done a first fit with nlme using the mean of each group. Comparing several models, the best fit is: modm0c<-nlme(pds~Asym/(1+exp((xmid-age)/scal)), fixed=list(Asym~1,xmid~1,scal~1), random=Asym+xmid~1|nichoir,data=croispulm, start=list(fixed=c(10,5,2.2)),...

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