search for: cchi

Hello all! I have a conundrum that I''m _sure_ someone else has already thought of and solved. How does one best handle the scenario of association object changes and data integrity? For example, if I have a standard ecommerce site that sells Products and people can have Orders and an Order has_many Products... then, what happens if Product #3 is part of Order #2 but at some point, the

Hello! I''ve been trying today to setup fleximage to handle photo uploads to a RoR application by following the tutorial that is provided (http://github.com/Squeegy/fleximage/wikis/gettingstarted) Originally, I just dropped in all of the sample code that they provided, which I copied below this question. - When I tried to access "new" to upload a new photo, I received an error

...regression model. for example: first I run the model, "name<-glm(dep~env1+env2..., family= binomial, data=new)" after that, I did stepwise for name name.step<-step(name, direction="backward") here, I still got those variables which were not significant, for example: secchi was not significant (see below example), but still it was in the model. how can I remove those variables which are not significant in forward/backward stepwise?. another question, when I wrote direction="backward", I got the results same as in the process of "forward". It is r...