search for: model_2

I''ve setup two models, 1 and 2, that are associated by has_and_belongs_to_many. I''m trying to get an attribute from model_1 to use in a method in model_2. When I use the code below, I get an error saying ''undefined method model_1_id''. What am I missing? Thanks! Model_2.rb Class Model_2 < ActiveRecord::Base ... has_and_belongs_to_many :model_1 def some_method attr_a * Model_1.find(model_1_id).attr_I_need end -- You rece...

...data_frame <- data.frame(a,b,c,d) model_1 = glm.nb(a ~ b + d , data = data_frame) pred_model_1 = predict(model_1, newdata = data_frame, type = "response", se.fit = FALSE, dispersion = NULL, terms = NULL) subset_of_dataframe = subset(data_frame, (b > 80 & c < 190 )) model_2 = glm.nb(a ~ b + d , data = subset_of_dataframe) pred_model_2 = predict(model_2, newdata = subset_of_dataframe, type = "response", se.fit = FALSE, dispersion = NULL, terms = NULL)

Hi R users, The nlme library enabled several alternate error structures useful for longitudinal or repeated-measures data. For example, a continuous AR(1) process: model_2 = update(model_1, correlation = corCAR1(form = ~ time | subject)) Does anybody know if this is available in lme4? Thank you Ben -- View this message in context: http://www.nabble.com/Alternate-error-structures-in-lme4--tp24226643p24226643.html Sent from the R help mailing list archive at Nabble....