Good evening, I'm having a datset with age as the independent variable. Age is given as a point number, i.e. 38.82 for a person who is 38 years and one month old. I'm supposed to get averages three times a year with 1/3 of a year between them. What would be a suitable way of doing so? The examples I've seen in the archives here are unfortunately all for cases where months or days are given as variables.