search for: stop_dat

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2011 Apr 20
3
[test message] Can R replicate this data manipulation in SAS?
...ides whether that constitutes HAART or not. To me, this is a pretty tricky data manipulation in SAS. Is there any way to get the equivalent result in R? Thanks, Paul **** SAS syntax for coding HAART in HIV patients; **** Read in test data; data haart; input id book_class $ start_date :mmddyy. stop_date :mmddyy.; format start_date stop_date mmddyy8.; cards; 1004 NRTI 07/24/95 01/05/99 1004 NRTI 11/20/95 12/10/95 1004 NRTI 01/10/96 01/05/99 1004 PI 05/09/96 11/16/97 1004 NRTI 06/01/96 02/01/97 1004 NRTI 07/01/96 03/01/97 9999 PI 01/02/03 . 9999 NNRTI 04/05/06 07/08/09 ; run; proc print...
2008 Jul 12
3
calculations on nested resources
Hi, I can''t seem to find a solution to the folowing problem. I have 3 resources that are all bound to eachother like this: class Item < ActiveRecord::Base belongs_to :item_category // has a date and amount attr end class ItemCategory < ActiveRecord::Base has_many :items has_many :item_tops // groups the items in categories end class ItemTop < ActiveRecord::Base
2009 May 05
3
Oracle-JRuby error
...-2.2.2/lib/active_record/dirty.rb:161:in `field_changed?'' C:/jruby-1.2.0/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/dirty.rb:135:in `write_attribute_with_dirty'' C:/jruby-1.2.0/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/attribute_methods.rb:216:in `stop_date='' C:/jruby-1.2.0/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/base.rb:2587:in `attributes='' C:/jruby-1.2.0/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/base.rb:2583:in `each'' C:/jruby-1.2.0/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/activ...