search for: schoolyear

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2006 Jun 17
2
problem with select_date
In my form I have these items: <%= select_year Date.today, :start_year => Schoolyear.get_startdate.year, :end_year => Schoolyear.get_enddate.year %> <%= select_month Date.today.month %> No matter what I do, in my controller I can''t seem to access the selected year and month. I have tried params[:month].to_s and also params[:date][:month], plu...
2012 Sep 25
3
Plotting of regsubsets adjr2 values not correct
Hi, I want to make model selection with regsubsets. My code is: a<-regsubsets(Gesamt ~ CommunistSocialist + CountrySize + GNI + Lifeexp + Schoolyears + ExpMilitary + Mortality + PopPoverty + PopTotal + ExpEdu + ExpHealth, data=olympiadaten, nbest=2) summary(a) plot(a,scale="adjr2") (output attached) The problem is now, that I want to fit the best model again "manually" and have a look at it, but the value of the adjusted...
2012 Sep 25
2
Regsubsets model selection
Hi, I have 12 independent variables and one dependent variable. Now I want to select the best adj. R squared model by using the regsubsets command, so I code: > plot(regsubsets(Gesamt ~ CommunistSocialist + CountrySize + GNI + Lifeexp + Schoolyears + ExpMilitary + Mortality + + PopPoverty + PopTotal + ExpEdu + ExpHealth, data=olympiadaten, nbest=1, nvmax=12), scale='adjr2') Then I get the picture I attached. The problem is, that the best model has an adjusted R squard of 0.49. But if I regress e.g. my y on only the variable PopTot...