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Hi to all. Where can I see workingexamples of the Prototype Javascript framework? Thank you very much. Sergio --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to rubyonrails-spinof...

Here's my little discussion example for a quadratic regression: http://pj.freefaculty.org/R/WorkingExamples/regression-quadratic-1.R Students press me to know the benefits of poly() over the more obvious regression formulas. I think I understand the theory on why poly() should be more numerically stable, but I'm having trouble writing down an example that proves the benefit of this. I am beginni...

Helo everybody, I'm new to R and have some issues with my data in R. My raw data look like that: ID Day size 1 1 7 1 1 7.2 1 1 7.1 2 1 7.3 2 1 7.4 2 1 7.2 3 1 7 3 1 7.1 3 1 7.5 4 1 7.3 4 1 7.2 4 1 7.6 1 2 7 1 2 7.2 1 2 7.1 2 2 7.1 2 2 7.4 2 2 7.2 3 2 7.5 3 2 7.1 3 2 7.5 4 2 7.2 4 2 7.2 4 2 7.3 1 3 7.4 1 3 7.2 1 3 7.1 2 3 7.2 2 3 7.4 2 3 7.2 3 3 7.4 3 3 7.2 3 3 7.5 4 3 7.4 4 3 7.2 4 3 7.7

Since I''m setting up my development environment on a new system, I figure now is the time to get rid of one of the extra dependencies: NQXML. It appears that REXML can now parse the whole classes xml file in about 20 seconds on this machine, which is a huge improvement over the many, many minutes it used to take. So I am now updating extract.rb to use REXML instead of NQXML.

...list of "Do This, Not That" bits, but it is hard to find particular approaches that almost all of you will agree to. Almost everybody agrees that calling rbind over and over again is slow, and do.call with rbind and a collection of stackable things is better: http://pj.freefaculty.org/R/WorkingExamples/stackListItems.R If you have ideas for "Do This, Not That", I'd be glad to hear them and I'll look for example applications that make them relevant. pj -- Paul E. Johnson Professor, Political Science ? ?Assoc. Director 1541 Lilac Lane, Room 504 ? ? Center for Research Method...

Hello; I am having a problems with the interpretation of models using ordered or unordered predictors. I am running models in lmer but I will try to give a simplified example data set using lm. Both in the example and in my real data set I use a predictor variable referring to 3 consecutive days of an experiment. It is a factor, and I thought it would be more correct to consider it ordered. Below

I have a general question about coefficients estimation of the mixed model. I simulated a very basic model: Y|b=X*\beta+Z*b +\sigma^2* diag(ni); b follows N(0,\psi) #i.e. bivariate normal where b is the latent variable, Z and X are ni*2 design matrices, sigma is the error variance, Y are longitudinal data, i.e. there are ni