Finding minimum value within each repeating sequence of column values

[#1]

What formula will find a minimum value within each repeating sequence of column values?

I have a large database in which I wish to report the minimum (maximum) value within each 7-member, repeating sequence in a column of real values.

Thanks for any help.

[#2]

You can go to Tables>Summary>Column of Interest>Statistics>Min

[#3]

To add to above comment: If you have or can make an index column with an unique value for each of your series you can add that to the "Group" field in the Summary dialog in order to get the minimum for each of the series.