Quick Question
What is the average age of patients in the training set, ClaimsTrain?
Exercise 1
Numerical Response
What proportion of people in the training set (ClaimsTrain) had at least one diagnosis code for diabetes?
Exercise 2
Numerical Response
Explanation
Both of these answers can be found by looking at summary(ClaimsTrain). The mean age should be listed under the age variable, and since diabetes is a binary variable, the mean value of diabetes gives the proportion of people with at least one diagnosis code for diabetes.
Alternatively, you could use the mean, table, and nrow functions:
mean(ClaimsTrain$age)
table(ClaimsTrain$diabetes)/nrow(ClaimsTrain)
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