search for: compdat

When run from the console, the following code works, when run through the WEBrick server I get a "You have a nil object where you didn''t expect it!" class Competition < ActiveRecord::Base has_many :comp_dates, :order=>:position def initial_date comp_dates.first end def display_dates i_d = initial_date if i_d.nil? return "unknown"

Hi all ARCH modelling I have a problem now on how to proceed with further steps in my analysis. I did a linear OLS regression with my daily data of stock and index returns. There is now the problem of arch in my error terms. Thus I used the following r command: garch(resid_desn, order=c(0,2)) ## This ARCH(2) process seems to fit the best after trial and error. Consequently, I get there three

I''m very new to rails. I have on "main" model class "Competition" with a supporting model class "CompDates" arranged in a 1:m relationship. In my "list" action, I would like to order the competitions by earliest date. In other languages, I probably would have simply created a view in the database. If I''m trying to limit myself to migration supported database usage though...