I have 3 columns: "A" contains the day, "B" contains the hours, and "L" contains some values. For each day, there are 24 hours and these are associated with either negative or positive values. I would like to extract the minimum and maximum value of only the positive values (i.e. >=0) from column "L" for each day and paste them to another column as shown in the image. There are 365 days so 8760 hours and values. What is the best method to achieve this?