using predict() and table() in r

Question

I have used glm on the learning data set which without NAs has 49511 observations.

glmodel<-glm(RESULT ~ ., family=binomial,data         


        

Answer 1

You used the wrong parameter name in predict. It should be newdata=, not data=. So the reason you get 49511 elements is that the default for predict when you don't specify new data is to output the predicted values for the data you created the model with. Hence you're getting the predicted values for your original data.