search for: exphealth

Displaying 2 results from an estimated 2 matches for "exphealth".

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 R squared is not the same as in the regsubsets output? This is also the c...
2012 Sep 25
2
Regsubsets model selection
...pendent 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 PopTotal, then I already get an adjusted R squared of 0.779! So this simple model...