Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: Phase difference between different sine waves
From
Nilay Kumar <[email protected]>
To
[email protected]
Subject
st: Phase difference between different sine waves
Date
Mon, 24 Mar 2014 07:34:26 -0400
Dear Statalisters,
I have a time series dataset that I'm using to perform a cosinor
analysis. There are four subjects with 400 weekly observations with a
seasonal pattern of variation. I used OLS regression to fit a
sinusoidal wave to these variables using the cosine and sine functions
of time as predictors.
I want to know how I can calculate the phase difference between the
different sine waves generated by the OLS regression for different
variables. If someone can suggest a way to graphically represent the
phase difference that would be very helpful. Thanks in advance for
your time!
Sincerely,
Nilay
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/