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omegadan
2010 Jun 09
0
Testing for differences in amplitude and phase
...ts to find
out whether the amplitude of the fist harmonic, the amplitude of the second harmonic,
the phase of the first harmonic and the phase of the second harmonic differs
between the treatment groups.
My attempt
was to create a lme containing the two oscillations and the treatment group:
omegaDay=omega*Day # there is probably a more
elegant solution
omega2Day=omega2*Day
m=lme(y~(cos(omegaDay)+sin(omegaDay)+cos(omega2Day)+sin(omega2Day))*treatment,
random=~1|subject)
summary(m)
The summary
table tells me that the respective elements are significant (except for...