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Re: st: Collapsing data to daily data
From
Austin Nichols <[email protected]>
To
[email protected]
Subject
Re: st: Collapsing data to daily data
Date
Mon, 28 Feb 2011 15:29:28 -0500
Brigham Whitman <[email protected]>:
You can generate a date variable (see
help dates_and_times##converting
etc.) and then collapse by that date variable; but what is your aim
there--do you want mean lat/lon? Or the centroid of all locations?
Time weighted? Think about what you want before you blindly collapse.
On Mon, Feb 28, 2011 at 3:21 PM, Brigham Whitman <[email protected]> wrote:
> Hello,
>
> 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.
>
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