Hi all, hoping someone can help...

I have a matrix of survey observations. I want to statistically analyze observations at different temporal scales thus I want to be able to create groups of observations based on time of observation. For instance I would like to group all observations into 3 minute intervals based on observation time (all observations that fall into the first 3 minutes of the survey would be in category 1, second 3 minutes category 2 etc). However because the matrix is large it is impractical to create a formula writing out all the possible categories.

if my problem is still unclear, please ask for clarification

Thank you in advance for your help.

th