search for: singletable

Hello! I am using R 2.5.1 on a Apple Power Book G4 with Mac OS X 10.4.10 and I am still R beginner. I try to calculate a t.test() using this code: TTest75<-t.test(Fem75, Mal75, alternative= "two.sided", paired= TRUE) This works properly, but I have two variables with a lot of missing data and therefore get the error message: TTest66<-t.test(Fem66, Mal66, alternative=

Hi all, I would like to discuss a design idea I have in mind with you, in order to get critical feedback. ActiveRecord supports single table inheritance(STI) "per se", BUT you must add all possible instance variables(properties) of all subclasses to the "base table"(as columns). I would like to circumvent this restriction. Say we have a class AbstractGenericThing <

I know that Rails uses the Single-Table Inheritance as mentioned in the wiki (http://wiki.rubyonrails.com/rails/pages/SingleTableInheritance). I was wondering if there was an easy way of implementing Class Table Inheritance easily (one table per class) as defined in http://www.martinfowler.com/eaaCatalog/classTableInheritance.html. The model that I am used to is Class Table Inheritance, and for some uses it just feels mo...

Hey, The rails ORM is great... But there is no support for enheritance except for the singletable enheritance. So we''ve come up with the idea: Create a piece of code that allows the programmer to encapsulate / inherit objects in a easy way. One example of it''s practical use. Imagine a system where you have to store clients, employees and partners. They are all real person...

I am looking for examples of code that demonstrates the fine tuning of the strip panels in lattice graphics and uses plotmath characters. The code for the graphic is as follows: xyplot(lagy ~ n | rho1 * rho2, data= data, layout=c(2,6), span = 1, xlab = "Sample Size", ylab = "Bias in the Coefficient for the Lag of X", type = "o") rho1 is a four level factor