search for: createpersons

I hope a very basic R/S programming question is appropriate for this list... I have a function which returns a list of several (named) numeric values characterising an event history for a person. I want to invoke the function many (1000) times and create a vector of these lists to represent the histories of a population. At first, I thought that a data frame would be the appropriate way to

Hello, I''ve got some experience in Java, and recently, I''ve begun to practice with Rails. One of the things that has surprised to me, after I''ve read some books, it''s that classes hasn''t got attributes; the attributes are in the files db/migrate/*. After that, the ORM makes the mapping with de Database. But the attributes aren''t in the files