How to calculate Day/Month
I have a data set with a time column covering 10 years of data. How can I calculate month/day (without year) from this column? I want to place this new variable on x axis and overlay my plot by year to look at the trend of my variable (ozone concentration) year-over-year. One idea is to use Day of Year, but I want to show the months on the x axis too which is not possible with Day of Year. Any sug...
vince_faller