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st: Collapsing data to daily data

From   Brigham Whitman <>
Subject   st: Collapsing data to daily data
Date   Mon, 28 Feb 2011 15:21:00 -0500


I have time series data where there are multiple data points per
individual per day (it is animal GPS movement data).  I want to
collapse these data to get one data point per individual per day.
Using Stata's collapse command, I only see functions to collapse from
daily data to weekly, monthly, annual, etc. data.  Is there a way to
collapse from multiple points per day to daily data?  If anybody has
done this before, I would appreciate some advice.

Thank you,

Brigham Whitman
Syracuse, NY

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