I have a problem here....
I have a two columns data, one column shows the data and time, with the
interval of 10 seconds each, and the other column shows the noise level data
( all in the renge of 40 to 100) at the perticular time,
now the it has only got two columns but the data is very big, with total of
40,000 data,
so for each minute there is total 6 noise level data.
what I want is to find a maximum noise level for every 15 minutes data, that
means a maximum noise level for each 90 points data....
I dont know how to do that....
Regards