[SciPy-user] Calculating daily averages from a timeseries without using the timeseries package.

[Dharhas Pothina]

Hi All,

I have two arrays t & sal. t was created from an array of datetimes using the date2num function. The timeseries is approximately at an hourly frequency but there are days with little or no data or data at a non hourly frequency. How would I calculate the average of all salinity values on a particular day and form a new time series.

t_days, sal_dailyavg

I eventually plan to use the timeseries toolkit for my timeseries analysis but I'm close to the end of a project right now and don't have the time to install and learn it right now so I was hoping someone knew how to do this within numpy/scipy. I can think of a fairly laborious way using looping through each day and selecting the data in that day calculating the average and populating a new array. 

thanks

- dharhas